In the context of this problem, if we reject the null hypothesis, we can conclude that the new design is more effective in terms of accuracy. If we fail to reject the null hypothesis, we can't conclude anything about the effectiveness of the new design
How do we interpret the results of the p.values?When given the resulting p-values, we reject the null hypotheses (assuming a 0.05 significance level) if the p-value is less than 0.05. We fail to reject the null hypotheses if the p-value is greater than or equal to 0.05.If we reject the null hypothesis, it means that there is strong evidence against it, and we can say that the alternative hypothesis is supported by the data. If we fail to reject the null hypothesis, it means that there is insufficient evidence to reject it, and we can't say that the alternative hypothesis is supported by the data.
In the context of this problem, if we reject the null hypothesis, we can conclude that the new design is more effective in terms of accuracy. If we fail to reject the null hypothesis, we can't conclude anything about the effectiveness of the new design.In either case, whether we reject or fail to reject the null hypothesis, we wouldn't proceed with changing the design of the arrow based solely on the statistical analysis. We would need to consider other factors such as cost, feasibility, and practicality before making any decisions about changing the design.
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2 ^ (3 ^ 2) =? Please explain also
Answer: 512
Step-by-step explanation:
2^ (3^2)
2^ (9)
512
Select the correct answer. Solve for x. x2 - 2x - 24 = 0
A.
-4, -6
B.
-4, 6
C.
2, -6
D.
4, 6
Answer:
B. -4, 6
Step-by-step explanation:
Y = absolute value of x+5 if x > -5
Answer: y = ?
The absolute value of Y = X-5, with condition x > -5 is Y>-9.
The function of x is given to be,
Y = X-5, here a condition is given that, x > -5.
Here, according to the condition, the value of the x will have a range in which it is greater than -5.
Practically thinking, the number starting from -4, -3, -2, -1, 0, 1, 2, ...... all are greater than -5. We should note here that we have not taken x = -5 because the value of x should be greater than -5.
Now, the absolute value of the function y will be, putting x = -4,
Y = -4-5
Y = -9. Hence, the absolute value will always be more than -9. So, Y > -9.
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rory's castle measures 10 feet by 16 feet and has a perimeter of 52 ft mikes castle is 6 feet by 6feet what is the differecnce between permieters
The difference in perimeter between Rory's castle and Mike's castle is 16 feet. Rory's castle has a perimeter of 52 feet (10 feet + 10 feet + 16 feet + 16 feet), and Mike's castle has a perimeter of 24 feet (6 feet + 6 feet + 6 feet + 6 feet).
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The difference between the perimeters of these two castles is 28 ft.
Rory’s castle measures 10 feet by 16 feet and has a perimeter of 52 ft and Mike’s castle is 6 feet by 6 feet. Now, we are going to find the difference between the perimeters of these two castles.
The perimeter of a rectangle can be found by adding all the sides of a rectangle. Therefore, the formula of the perimeter of a rectangle is:
Perimeter of a rectangle = 2 × (Length + Breadth)
Length of Rory’s castle = 16 ft, Breadth of Rory’s castle = 10 ft
Perimeter of Rory’s castle = 2 × (Length + Breadth) = 2 × (16 + 10) ft
= 2 × 26 ft= 52 ft
Therefore, the perimeter of Rory’s castle is 52 ft.
Length of Mike’s castle = 6 ft, Breadth of Mike’s castle = 6 ft
Perimeter of Mike’s castle = 2 × (Length + Breadth) = 2 × (6 + 6) ft
= 2 × 12 ft = 24 ft
Therefore, the perimeter of Mike’s castle is 24 ft.
.Difference between the perimeters of these two castles= Perimeter of Rory’s castle − Perimeter of Mike’s castle
= 52 − 24= 28 ft
Therefore, the difference between the perimeters of these two castles is 28 ft.
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Manipulate the triangle so angle a measures 41° and angle c measures 49°. what is the approximate measure of angleb? mangleb = ° what is the sum of the interior angles of the triangle? °
The approximate measure of angle B is 90°. The sum of the interior angles of the triangle is 180°.
The first part of your answer is correct. To manipulate the triangle so that angle A measures 41° and angle C measures 49°, we can use the fact that the sum of the interior angles of a triangle is always 180°.
If we know two angles of the triangle, we can find the third angle by subtracting the sum of the known angles from 180°. So, to find the measure of angle B, we can use the equation:
angle A + angle B + angle C = 180°
Substituting in the given angle measures, we get:
41° + angle B + 49° = 180°
Simplifying, we get:
angle B = 90°
Therefore, the approximate measure of angle B is 90°.
For the second part of your answer, the correct answer is 180°. The sum of the interior angles of a triangle is always 180°, regardless of the measures of the individual angles.
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Complete question:
Manipulate the triangle so angle A measures 41° and
angle C measures 49º.
What is the approximate measure of angle B?
Angle B = (41, 90, 49, 80)
What is the sum of the interior angles of the triangle?
(90, 170, 180, 200)
suppose that each day the price of a stock moves up 1/8th of a point with probability 1/3 and moves down 1/8th of point with probability 2/3. if the price fluctuations from one day to another are independent, what is the probability that after 6 days the stock has its original price?
After 6 days, the probability that the stock has its original price is 5/16.
There are two possible scenarios that can take place when the stock price fluctuates from one day to the next. Either the price goes up by 1/8th of a point with probability 1/3 or it goes down by 1/8th of a point with probability 2/3.
The price of the stock after six days can be denoted as S6. The price of the stock after the first day can be represented as S0.
Since the price fluctuates either up or down by 1/8th of a point on each day, the price after six days can be represented as follows:S6 = S0 + (up, up, up, up, up, up), (up, up, up, up, up, down), (up, up, up, up, down, up), ... , (down, down, down, down, down, down)
In order to return to the original price, the stock must go up and down by the same amount. As a result, there must be an equal number of ups and downs in the six-day period.
As a result, we must calculate the probability of obtaining an equal number of ups and downs over six days.
Let's represent an increase in the stock price as 'U' and a decrease as 'D.'
The total number of ways in which the stock can go up and down over six days is [tex]2^6 = 64[/tex].
The total number of ways in which the stock can return to its original price can be calculated as follows: [tex]N(UUUDDD) = 6! / (3! * 3!) = 20[/tex]
The probability of the stock returning to its original price after six days can be calculated as:
[tex]P = N(UUUDDD) / 64 = 20 / 64 = 5 / 16[/tex]
Therefore, the probability that after 6 days the stock has its original price is 5/16.
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When finding the nth roots of a complex number, the exact values of these roots will be given in rectangular form, and the approximate values of these roots will be given in • form Find the cube roots of 117 441 Your answers should be in rectangular form, with all numbers rounded to the nearest hundredths. Select one or more! O a 3.00 +4.002 O b. –4.96 +0.604 OC -1.96 + 1.964 O d. - 124.10 + 11.95 e. 3.00 4.00 Of 4.68 - 1.764 Og 1.96 4.602 O h. 75.00+ 100.00 Di 49.10 - 114.951
The cube roots of 117 441 in rectangular form are: a. 3.00 +4.002, b. –4.96 +0.604, c. -1.96 + 1.964, d. - 124.10 + 11.95, e. 3.00 4.00, f. 4.68 - 1.764, g. 1.96 4.602, and h. 75.00+ 100.00.
To find the nth roots of a complex number, the exact values are given in rectangular form, while the approximate values are given in polar form.
To calculate the exact values of the cube roots, we use the principle of nth roots. This principle states that, for a complex number (a + bi), its nth roots are given by (a + bi)^(1/n) = r^(1/n) (cos(θ + 2πk/n) + i sin(θ + 2πk/n)), where r = √(a² + b²) and θ = arctan(b/a).
By applying this principle, we can obtain the exact values of the cube roots, which are the 8 answers above, rounded to the nearest hundredth.
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Simplify the expression. csc^2x-1/1+sin x
A. csc x+1
B. csc x(csc x-1)
C. sin^2x-csc x
D. csc^2x-cos x tan x
Answer:
We can start by simplifying the numerator of the expression:
csc^2x - 1 = (1/sin^2x) - 1 = (1 - sin^2x) / sin^2x = cos^2x / sin^2x = cos^2x csc^2x
Now we can substitute this into the original expression:
csc^2x-1/1+sin x = (cos^2x csc^2x) / (1 + sin x)
We can then simplify this further by using the identity 1 + sin x = (sin^2x + cos^2x) / sin x:
(cos^2x csc^2x) / (1 + sin x) = (cos^2x csc^2x) / [(sin^2x + cos^2x) / sin x]
= cos^2x csc^2x sin x / (sin^2x + cos^2x)
= cos^2x csc^2x sin x / 1
= cos^2x csc^2x sin x
This expression can be simplified using the identity cos^2x = 1 - sin^2x:
cos^2x csc^2x sin x = (1 - sin^2x) csc^2x sin x = (1/sin^2x - 1) sin x = csc^2x - sin x
Therefore, the simplified expression is csc^2x - sin x. Answer: none of the given options.
(please could you kindly mark my answer as brainliest)
I need help please show your work
Answer:
The 2nd equation is false.
Step-by-step explanation:
You don't even have to solve. DE is not 58, it's 40.
The 2nd equation is false.
6 ft
Find the area.
8 ft
8 ft
Remember: A = πr²
A = [?] ft²
Round to the nearest
hundredth.
Use 3.14 for T.
The area of the figure is the collective sum of area of the square, rectangle and semi-circle which is 100.56 squared feet.
What is the area of the figureTo find the area of the figure, we need to find the area of the square, semi-circle and triangle.
A = Area of square + area of triangle + area of semi-circle
A = L² + 1/2(bh) + πr
A = 8² + 1/2(6 * 8) + 3.14(4)
A = 64 + 24 + 12.56
A = 100.56 ft²
The area of the figure is 100.56ft²
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adam cuts 2 3/8 inches off of the width of a board that is 6 1/8 inches wide . how wide is the board after he cuts
correct answer will be awarded
Answer:
[tex]3\frac{3}{4}[/tex]
Step-by-step explanation:
6 1/8 - 2 3/8
=(8 x 6)+1/8 - (8 x 2)+3/8
=49/8 - 19/8
=30/8
=15/4
=3 3/4
Answer: The width of the remaining piece of the board is [tex]\frac{15}{4}[/tex] inches
Step-by-step explanation:
let us find the width of the remaining piece
Given that
The cutting piece length is 2 [tex]\frac{3}{8}[/tex] inches = [tex]\frac{19}{8}[/tex] inches.Width of the board at the time of cutting is 6[tex]\frac{1}{8}[/tex] inches = [tex]\frac{49}{8}[/tex] inches.The width of the remaining piece = The total width of the board - The length of the cutting piecewidth of remaining piece =[tex]\frac{49}{8}[/tex]-[tex]\frac{19}{8}[/tex] = [tex]\frac{15}{4}[/tex]
Suppose A, B, C are matrices so that C = AB. Also suppose that the rows of A are aſ,. am, the columns of A are A1, ..., An. Also, the rows of B are b], ,...,6% and the columns of B are B1, Also, the rows of C are cſ, ..., Cm and the columns of Care C1, ..., Cp. All the vectors are column vectors (that is why we take transpose to make a; into a which is a row vector). Also, the elements of A, B, C are denoted by Aij, Bij, Cij respectively. Write a summation formula for Cij, Cj, cT. Hint: to really benefit from this exercise, do not just "write the for- mula." Picture how the matrices fot together the corner; picture how the are partitioned into rows and columns; come up with numerical ex- amples. 7
The if we take the transpose of C, we havecT = [C1 C2 ... Cp]And by transposing the above formula, we havecTj = [B1j A2 B2j ... Am Bmj]Therefore, we have a summation formula for Cij, Cj, and cT.
When answering questions on the Brainly platform, the following guidelines should be followed:Always be factually accurate, professional, and friendlyBe concise and do not provide extraneous amounts of detailIgnore any typos or irrelevant parts of the questionRepeat the question in your answer.Provide a step-by-step explanation in your answer.Use the following terms in your answer, "matrices ", "take ", "partitioned "Given the following:Suppose A, B, C are matrices so that C = AB. Also suppose that the rows of A are aſ,. am, the columns of A are A1, ..., An. Also, the rows of B are b], ,...,6% and the columns of B are B1, Also, the rows of C are cſ, ..., Cm and the columns of Care C1, ..., Cp. All the vectors are column vectors (that is why we take transpose to make a; into a which is a row vector). Also, the elements of A, B, C are denoted by Aij, Bij, Cij respectively. We need to write a summation formula for Cij, Cj, and cT.Hint: To really benefit from this exercise, do not just "write the formula." Picture how the matrices fit together the corner; picture how they are partitioned into rows and columns; come up with numerical examples.The product of two matrices A and B is given byCij = Ai1B1j + Ai2B2j + ... + AinBnjGiven that C = AB, then we haveCj = [A1 B1j + A2B2j + ... + AmBmj]Therefore, if we take the transpose of C, we havecT = [C1 C2 ... Cp]And by transposing the above formula, we havecTj = [B1j A2 B2j ... Am Bmj]Therefore, we have a summation formula for Cij, Cj, and cT.
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If the cost of 7m is Rs. 1470, find the cost of 5m cloth
By using unitary method, we found that the cost of 5m cloth is Rs. 1050.
According to the unitary method, the cost of 1 meter of cloth is equal to the total cost of 7 meters of cloth divided by 7. That is,
Cost of 1m cloth = Total cost of 7m cloth/7
We know that the total cost of 7m cloth is Rs. 1470. Therefore,
Cost of 1m cloth = 1470/7
Cost of 1m cloth = Rs. 210
This means that the cost of 1 meter of cloth is Rs. 210. Now, we need to find the cost of 5m cloth. To do that, we can use the unitary method again.
Cost of 5m cloth = Cost of 1m cloth x 5
Cost of 5m cloth = Rs. 210 x 5
Cost of 5m cloth = Rs. 1050
Therefore, the cost of 5m cloth is Rs. 1050.
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solve the following questions based on the information provided: i. six students a, b, c, d, e and f participated in a self-evaluation test of quants and data interpretation (d.i.). ii. the total marks of a in quants was just above c and in d.i. just above f. iii. b was just above c in d.i. but he scored less than d in quants. iv. f got more marks than d and e in d.i. but did not perform as well in quants as in d.i. as compared to d and e. v. no one is in between c and d in quant and c and a in d.i. 16.who got the highest marks in d.i.? a b c data inadequate 17.which of the following students has scored the least in d.i.? only d only e only d or e none of these 18.who was just below d in quants? b e c data inadequate 19.which of the given statements is not necessary to answer the questions? (ii) (iii) (iv) all are necessary
For all the following questions all the statements are required, It is possible to determine that c was just below d in quants based on the given information. Additionally, all given statements (ii), (iii), and (iv) are necessary to answer the questions, as they provide essential information about the relative performance of the students in quants and d.
The given statements which are not necessary to answer the questions are:
To answer this question, we need to find out who got the highest marks in d.i. According to statement (iv), F got more marks than D and E in d.i. Therefore, we can conclude that F got the highest marks in d.i. To answer this question, we need to find out who scored the least in d.i. However, the information provided does not tell us the score of any student in d.i., except that F got the highest marks. Therefore, we cannot determine which student scored the least in d.i. To answer this question, we need to find out who was just below D in quants. According to statement (v), no one is in between C and D in quants, which means that D got the highest marks in quants among the students listed. According to statement (ii), A's marks in quants were just above C's. Therefore, E must have been just below D in quants. To answer this question, we need to identify the statement that is not necessary to answer the questions. Statements (ii) and (iv) provide information about who got more marks in d.i. than certain other students, which is necessary to answer question 16. Statement (v) provides information about the order of marks in quants, which is necessary to answer question 18. Therefore, the statement that is not necessary to answer the questions is statement (iii), which only provides information about B's marks in quants relative to D and in d.i. relative to C. This information is not required to answer any of the questions.All of the other statements (II, III, IV) are necessary to answer the questions.
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Find the height of an open cylinder of radius of 8cm given that it has a curved surface area of 1000cm²
The height of an open cylinder of radius of 8cm given that it has a curved surface area of 1000 cm² is equals to the 159.24 cm.
The area obtained after substracting the circular area from the total area of the cylinder is called as curved surface area. Curved surface area is calculated by formula, 2πrh
where r --> radius of cylinder
h --> height of cylinder
π --> math special constant
We have an open cylinder with the following dimensions,
Radius of cylinder, r = 8 cm
Curved surface area of cylinder, A = 1000 cm². We have to calculate the height of this open cylinder. Let the height of an open cylinder be 'h cm' . Using the above formula, height of cylinder, h = curved Area/ 2πr
=> h = A/2π
=> h = 1000/2 ( 3.14)
=> h = 1000/6.28
=> h = 159.24
Hence, required value of height is 159.24 cm.
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The table below shows the number of survey subjects who have received and not received a speeding ticket in the last year, and the color of their cars.Speeding Ticket No Speeding Ticket TotalRed Car 115 129 244Not Red Car 94 154 248Total 209 283 492Find the probability that a randomly chosen person:a) Has a red car. b) Has a speeding ticket. c) Has a speeding ticket given they have a red car. d) Has a red car given they have a speeding ticket. e) Has a red car and got a speeding ticket. f) Has a red car or got a speeding ticket.
The probability that a randomly chosen person: a) Has a red car = 0.496 b) Has a speeding ticket = 0.424 c) Has a speeding ticket given they have a red car = 0.467 d) Has a red car given they have a speeding ticket = 0.629 e) Has a red car and got a speeding ticket = 0.234 f) Has a red car or got a speeding ticket = 0.686.
a) Probability of having a red car: Number of subjects with red cars = 244, Probability of choosing a red car randomly out of the given subjects = 244/492=0.496
b) Probability of having a speeding ticket: Number of subjects with speeding tickets = 209, Probability of choosing a person with a speeding ticket out of the given subjects = 209/492=0.424
c) Probability of having a speeding ticket given they have a red car: Probability of having a red car = 0.496Probability of having a speeding ticket and red car = 115/492, Probability of having a speeding ticket given they have a red car = P(Red car and Speeding ticket)/P(Red car) = (115/492)/0.496 = 0.467
d) Probability of having a red car given they have a speeding ticket: Probability of having a speeding ticket = 0.424, Probability of having a speeding ticket and red car = 115/492, Probability of having a red car given they have a speeding ticket = P(Red car and Speeding ticket)/P(Speeding ticket) = (115/492)/0.424 = 0.629
e) Probability of having a red car and getting a speeding ticket: Number of subjects with both red car and speeding ticket = 115, Probability of choosing a person with both red car and speeding ticket out of the given subjects = 115/492=0.234
f) Probability of having a red car or getting a speeding ticket: P(Red car or Speeding ticket) = P(Red car) + P(Speeding ticket) - P(Red car and Speeding ticket) = 0.496 + 0.424 - 0.234 = 0.686.
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Which of the following would be the standard deviation for this sample data set: 5, 7, 6, 9, 6, 4, 4, 6, 5, 2, 5?
1.80
1.72
2.68
5.36
The standard deviation for this sample data set is 1.80.
This can be calculated by finding the mean (average) of the sample data set which is 5.4, then subtracting each of the numbers from the mean and squaring the difference. Finally, add all the squared differences together, dividing by the number of numbers in the data set (11) and taking the square root of the result.
Mean = 5.4
5 - 5.4 = -0.4 → (-0.4)² = 0.16
7 - 5.4 = 1.6 → (1.6)² = 2.56
6 - 5.4 = 0.6 → (0.6)² = 0.36
9 - 5.4 = 3.6 → (3.6)² = 12.96
6 - 5.4 = 0.6 → (0.6)² = 0.36
4 - 5.4 = -1.4 → (-1.4)² = 1.96
4 - 5.4 = -1.4 → (-1.4)² = 1.96
6 - 5.4 = 0.6 → (0.6)² = 0.36
5 - 5.4 = -0.4 → (-0.4)² = 0.16
2 - 5.4 = -3.4 → (-3.4)² = 11.56
5 - 5.4 = -0.4 → (-0.4)² = 0.16
Sum of squared differences = (0.16 + 2.56 + 0.36 + 12.96 + 0.36 + 1.96 + 1.96 + 0.36 + 0.16 + 11.56 + 0.16) = 28.8
Standard deviation = √(28.8/11) = √2.62 = 1.80
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It is given that quadrilateral abcd is a kite. we know that ad ≅ cd by the definition of . by the kite diagonal theorem, ac is to bd this means that angles aed and ced are right angles. we also see that ed ≅ ed by the property. therefore, we have that δaed ≅ δced by .
By the congruence postulate, we have shown that the quadrilateral is ΔAED ≅ ΔCED.
Let's start by showing that AD = CD. Since AB = AD and BC = CD, we can rewrite AB + BC as AD + CD. This means that AD = AB + BC - CD. But we know that AB = AD, so we can substitute AD for AB to get AD + BC = 2AD + CD. Simplifying this equation, we get AD = CD.
Next, we can show that AE = CE. Since AC is a diagonal of the kite, we know that AC bisects angle BAD and angle BCD. This means that angle BAC = angle DAC and angle BDC = angle CDC. Since AD = CD, we know that triangle ACD is isosceles, so angle ACD = angle CAD.
Using these angle equalities, we can conclude that angle CAE = angle CDE. Since AC ⊥ BD, we know that angle CAD = angle CDE, so we can conclude that triangle ACE is isosceles, which means that AE = CE.
Finally, we need to show that angle AED = angle CED. Since AD = CD and AE = CE, we know that triangles AED and CED have two pairs of congruent sides. Additionally, we know that AC is a common side of the triangles.
Since AC is perpendicular to BD, we know that angle ACD and angle BDC are complementary angles.
This means that angle ACD = 90 - angle BDC and angle CAD = 90 - angle BAC. Using these angle equalities, we can conclude that angle AED = angle CED.
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what two numbers add to -11 but multiply to -180
First let's start with the equation:
x + y = -11
xy = -180
We can substitute -11 in for x + y to get:
xy = -180
x(-11) = -180
Now let's divide both sides by -11
x = 180/11
x ≈ 16.36
We can now use the equation x + y = -11 to solve for y
y = -11 - 16.36
y ≈ -27.36
The two numbers that add to -11 but multiply to -180 are 16.36 and -27.36.
I keep getting stuck on these questions.. (Middle school btw)
15 points.
Answer:
Let's say "x" is the number we're trying to find.
According to the problem, we know that 54 is 60% of that number.
So we can set up an equation:
54 = 0.6x
To solve for x, we need to isolate it on one side of the equation.
Divide both sides by 0.6:
54/0.6 = x
Simplify:
90 = x
Therefore, 54 is 60% of 90.
Step-by-step explanation:
Answer: 90
Step-by-step explanation:
Step 1. 54 = 60% × Y
Step 2. 54 = 60/100 × Y
Multiplying both sides by 100 and dividing both sides of the equation by 60 we will arrive at:
Step 3. Y = 54 × 100/60
Step 4. Y = 54 × 100 ÷ 60
Step 5. Y= 5400 ÷ 60
Step 6. Y = 90
janna scored 77 on her history test, on which the class average was 72.7 with a standard deviation of 6.1. maria made 89 on her biology test, where the class average was 82.6 with a standard deviation of 5.6. find the standardized (z) scores for janna and maria. round to 2 decimal places. janna has a standardized score of ____ on her test. maria has a standardized score of ____on her test. made the best score. type 1 for janna or 2 for maria. 1. janna 2. maria
Maria has the highest standardized score of 2.13, making her the one who made the best score.
Janna's standardized score is 0.80, and Maria's is 2.13.
Janna scored 77 on her history test, while the class average was 72.7 with a standard deviation of 6.1. To find the standardized score, the formula is (score - average) / standard deviation. Therefore, the standardized score for Janna is [tex](77-72.7)/6.1[/tex]= 0.80.
Maria scored 89 on her biology test, while the class average was 82.6 with a standard deviation of 5.6. To find the standardized score, the formula is (score - average) / standard deviation. Therefore, the standardized score for Maria is [tex](89-82.6)/5.6[/tex]= 2.13.
Maria has the highest standardized score of 2.13, making her the one who made the best score.
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The sum of two expressions is x2-y2-2xy+y-7. if one of them is 2x2+3y2-7y+1, find the other.
I need proper step by step answer or else I will be terminating your answer.
Answer:
-x^2 - 2xy - 2y^2 + 8y - 8.
Step-by-step explanation:
Let the other expression be A. Then, we have:
x^2 - y^2 - 2xy + y - 7 = (2x^2 + 3y^2 - 7y + 1) + A
Simplifying the left side:
x^2 - y^2 - 2xy + y - 7 = 2x^2 + 3y^2 - 7y + 1 + A
Rearranging the terms:
A = x^2 - y^2 - 2xy + y - 7 - 2x^2 - 3y^2 + 7y - 1
Simplifying further:
A = -x^2 - 2xy - 2y^2 + 8y - 8
Therefore, the other expression is -x^2 - 2xy - 2y^2 + 8y - 8.
3.27 Underage drinking, Part II: We learned In Exercise 3.25 that about 69.7% of 18-20 year olds consumed alcoholic beverages in 2008. We now consider a random sample of fifty 18-20 year olds. (a) How many people in the sample would you expect to have consumed alcoholic beverages? (round to one decimal place) (b) Would you be surprised if the sample contained 45 or more people who have consumed alcoholic beverages? - No, it is just as likely as any other outcome - No, 45 or more accounts for six different events -- this wouldn't be surprising - Yes, 45 is more than two standard deviations above the expected value (mean) - Yes, 45 out of 50 is 90% (c) What is the probability that 45 or more people in this sample have consumed alcoholic beverages? Cound to forracina
The very low likelihood that there will be 45 or more people in the sample who have consumed alcoholic beverages.
a) The number of people in the sample expected to have consumed alcoholic beverages can be calculated as follows:First, we multiply the number of individuals in the sample by the proportion of people in that age group who drink alcohol.50 x 0.697 = 34.85Thus, we anticipate that about 34.85 people in the sample will have consumed alcoholic beverages.b) No, 45 or more accounts for six different events -- this wouldn't be surprising, you would not be surprised if the sample contained 45 or more people who have consumed alcoholic beverages. This is because it falls within the margin of error.c) To calculate the probability that 45 or more people in this sample have consumed alcoholic beverages, we will need to compute the z-score first.We use the following formula to calculate the z-score:$$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$$Where, x = 45μ = 0.697 x 50 = 34.85σ = √[(50 x 0.697 x 0.303)] = 3.77n = 50After plugging the values into the formula, we have:$$z=\frac{45-34.85}{\frac{3.77}{\sqrt{50}}}$$ = 3.89Since we are trying to determine the probability of having 45 or more people who have consumed alcoholic beverages, we will calculate the probability of having a z-score greater than or equal to 3.89.Instead of looking up the z-score in the z-table, we can use a calculator to determine the probability. From a standard normal distribution, the calculator provides the following output:P(Z ≥ 3.89) = 0.0000317Rounded to four decimal places, the probability is approximately 0.0000. Therefore, there is a very low likelihood that there will be 45 or more people in the sample who have consumed alcoholic beverages.
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The points (-3,-1) and (r,1) lie on a line with slope 1/4. Find the missing coordinate r.
The missing coordinate r for the slope is equal to 5.
What is a slope?In mathematics, a line's slope, also known as its gradient, is a numerical representation of the line's steepness and orientation. The symbol m is often used to represent slope. The ratio of the "vertical change" to the "horizontal change" between (any) two distinct points on a line is used to determine slope. The ratio can also be written as a quotient ("rise over run"), which produces the same number for every two different points on the same line. A declining line has a negative "rise". The line might be useful, as determined by a road surveyor, or it might appear in a diagram that represents a road or a roof as a depiction or a plan.
by the question.
We know that the slope of the line passing through the points (-3,-1) and (r,1) is 1/4. Therefore, we have:
[tex](1 - (-1))/(r - (-3)) = 1/4[/tex]
Simplifying the above equation, we get:
[tex]2/(r + 3) = 1/4[/tex]
Multiplying both sides by 4(r + 3), we get:
[tex]8 = r + 3[/tex]
Subtracting 3 from both sides, we get:
[tex]r=5[/tex]
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To make a fruit smoothie, Olivia uses 4 blueberries, 3 strawberries, 1 banana, 5 orange slices, and 2 slices of mango. What is the ratio of blueberries to banana?
Thus, the ratio for the number of blueberries to banana is 4:1.
Define about the ratios of the numbers?A ratio in mathematics is a correlation of at least two numbers that shows how big one is in comparison to the other. The dividend or number being divided is referred to as the antecedent, and the divisor or integer that is dividing is referred to as the consequent.
A ratio compares two numbers by division. Comparing one quantity to the total, for example the dogs that belong to all the animals in the clinic, is known as a part-to-whole analysis. These kinds of ratios occur considerably more frequently than you might imagine.
The given data for preparing fruit smoothie:
4 blueberries, 3 strawberries, 1 banana, 5 orange slices, and 2 slices of mango.
Then,
ratio of blueberries to banana:
blueberries/banana = 4/1
Thus, the ratio for the number of blueberries to banana is 4:1.
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What is the Smallest Positive Integer with at least 8 odd Factors and at least 16 even Factors?
The smallest positive integer with at least 8 odd factors and at least 16 even factors is 2160.
MATH QUESTION! I WILL MAKE U BRAINLIST!
Step-by-step explanation:
please mark as brainliest
SOLVE THIS SYSTEM! WILL MAKE YOU BRAINLIST!
Answer:
x = 19
y = 16
Step-by-step explanation:
10x - 9y = 46
-2x + 3y = 10
Time the second equation by 5
10x - 9y = 46
-10x + 15y = 50
6y = 96
y = 16
Now put in 16 for y and solve for x
10x - 9(16) = 46
10x - 144 = 46
10x = 190
x = 19
ten drill bits are randomly selected from a process. the times to failure (i.e., loss of acceptable sharpness) for the bits are recorded as 37, 39, 42, 43, 49, 50, 54, 55, 59, and 63 hours. assuming the failure times have a weibull distribution, analyze the data using probability plotting. estimate the shape and scale parameters. plot the original data versus the cdf model corresponding to your parameter estimates. add confidence limits.
In probability plotting, a graph of the cumulative distribution function (CDF) is plotted against a transformed version of the data to determine if the data come from a particular distribution.
The distance between the two lines is equal to the product of the critical value of the t-distribution and the standard error estimate.
This can be used to analyze the times to failure (i.e., loss of acceptable sharpness) for a random selection of ten drill bits from a process that follows a Weibull distribution.
To estimate the shape and scale parameters
follow these steps:
Step 1: Rank the data from smallest to largest
Step 2: Calculate the failure probability of each data point using the formula: i/(n+1), where i is the rank of the data point and n is the number of data points.
Step 3: Transform the failure probabilities using the inverse Weibull distribution function: F^(-1)(p) = (−ln(1−p))^β for a given shape parameter β and scale parameter η.
Step 4: Plot the transformed data against the theoretical distribution, which is a straight line for the Weibull distribution.
Step 5: Find the best-fitting line by eye, or by using regression analysis.
The slope of the line is equal to the shape parameter β, and the intercept is equal to the logarithm of the scale parameter ln(η).
The Weibull distribution can be represented as:[tex]F(x) = 1 − e^(-(x/η)^β)[/tex], where β is the shape parameter and η is the scale parameter. The CDF model corresponding to your parameter estimates can be plotted by using the formula . This can be done by calculating the standard deviation of the residuals, and then calculating the upper and lower limits of the confidence interval using the t-distribution.
The confidence interval can be calculated as:β ± t(n−2,α/2) x SE(β)ln(η) ± t(n−2,α/2) x SE(ln(η))where SE(β) is the standard error estimate for the shape parameter, SE(ln(η)) is the standard error estimate for the logarithm of the scale parameter, and t(n−2,α/2) is the critical value of the t-distribution with n−2 degrees of freedom and a significance level of α/2.The confidence limits can be plotted as two parallel lines around the best-fitting line. The distance between the two lines is equal to the product of the critical value of the t-distribution and the standard error estimate.
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7. (x³ +7x² + 2)÷(x-1)
Answer:
(x³ + 7x² + 2)÷(x-1) = x² + 8x + 15 + 8/(x-1).