We need to assume the sample was randomly selected because we are making inferences about _____________

Answers

Answer 1

We need to assume the sample was randomly selected because we are making inferences about parameters.

In mathematics, the parameter is a variable for which the range of possible values identifies a collection of distinct cases in a problem. Any equation expressed in terms of parameters is a parametric equation. The general equation of a straight line in slope-intercept form, y = mx+b, in which m and b are parameters, is an example of a parametric equation.

In statistics, the parameter in a function is a variable whose value is sought by means of evidence from samples. The resulting assigned value is the estimate or statistic.

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Related Questions

Please help me answer this question. Having a hard time with it.
(Sorry if it’s blurry)

Answers

The new price of the pants, after the discount is applied, is the one in option B:

P = $38.40

What is the price of the pants excluding the tax?

We know that the original price of the pants is $64, and we have a discount of 40%.

Then to find the new price of the pants, we need to multiply the original price by a factor (1 - 40%/100%) = (1 - 0.4) = 0.6

Then the new price of the pants, exluding the taxes, we will get that the new price is:

P = $64*0.6

P = $38.40

Then we can see that the correct option is B.

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Dos horas y media ¿A cuántos minutos equivale?

Answers

Answer:

90 minutos

Step-by-step explanation:

una hora es 60 minutos y media es 30 minutos.

50 Points! Multiple choice geometry question. Photo attached. Thank you!

Answers

The correct answer is (D) 7 1/2

A submarine dives to a depth of 3775 m. It then climbs to a depth of 1395 m before descending one more time to a depth of 2890 m. How many meters in total has the submarine dived? What is the total distance (up and down) it has travelled? (Include the first descent in your calculations).

Answers

Step-by-step explanation:

3775  +  2890-1395 = total diving meters = 5270 m

Total movement = 3775  + ( 3775 - 1395 )   +  (2890 - 1395 ) = 7650 m

Pretty sure x is 75 but what do i write for the reason?

Thank uu

Answers

Answer:

Step-by-step explanation:

Interior angle sum = 180

2x - 45  +  x  =  180

3x  -  45  =  180

x  -  15  =  60

x  =  75

Given m ∥ n, find the value of x.

Answers

given that m is parallel to n,

the angle opposite (2x + 16)° is also (2x + 16)° as vertically opposite angles are equal.

using the corresponding angle rule we know that:

2x + 16 = 96

2x = 80

so x = 40

Can someone answer this question

Answers

Answer:  x+2

Step-by-step explanation:

It is not factorable through grouping method.   You can test for factors if you divide the factor and it goes in evenly (no remainder) then, it is a factor.

I will use synthetic division to test:

X-8:

8    |     1         -14        56       -64

     |                  8       -48        64        

           1          -6          8           0         =>no remainder so yes this is a factor

X+2:

-2   |     1         -14        56       -64

     |                 -2        32        -176        

           1         -16        88       -240       => remainder so NOT factor

X-2:

2    |     1         -14        56       -64

     |                  2       -24        64        

           1         -12        32           0        =>no remainder so yes this is a factor

X-4:

4    |     1         -14        56       -64

     |                  4       -40        64        

           1         -10         16           0        =>no remainder so yes this is a factor

HELP!
To keep fish in an aquarium healthy, the aquarium must maintain an average water temperature of 67°F. For 14 hours of the day, no hearing is required as the aquarium is naturally at 69°F. However, if left unheated for the remaining hours the temperature would drop to 50°F. How many degrees (during heating hours) should the tank temperature increase to maintain the average temperature?​

Answers

Answer:

Step-by-step explanation:

To find out how many degrees the tank temperature should increase during the heating hours to maintain the average temperature, we need to calculate the temperature difference between the target average temperature of 67°F and the temperature during the unheated hours (50°F).

The difference in temperature is:

67°F - 50°F = 17°F

Since the heating hours account for the remaining hours of the day, which is 24 hours minus the 14 hours when no heating is required, we have:

24 hours - 14 hours = 10 hours

To maintain the average temperature of 67°F, the tank temperature should increase by 17°F during the 10 hours of heating.

To find the increase per hour, we divide the total temperature increase by the number of heating hours:

17°F / 10 hours = 1.7°F

Therefore, the tank temperature should increase by 1.7°F per hour during the heating hours to maintain the average temperature of 67°F.

What is true about the triangles shown in the diagram? Select all that apply.

Answers

Answers:

Choice A)  Segment AC = 2*sqrt(17)

Choice B)  Segment BD is 32 units long

Choice F)  Segment AB is approximately 33 units long.

==========================================================

Explanation:

The triangles are similar, so we can form this proportion

CD/DA = DA/BD

2/8 = 8/x

2x = 8*8

2x = 64

x = 64/2

x = 32

BD is 32 units long

This means one of the answers is choice B. It rules out choice D.

--------------

The legs of right triangle ABD are

AD = 8BD = 32

Use the pythagorean theorem to find hypotenuse AB.

a^2 + b^2 = c^2

(AD)^2 + (BD)^2 = (AB)^2

8^2 + 32^2 = (AB)^2

(AB)^2 = 64 + 1024

(AB)^2 = 1088

AB = sqrt(1088)

AB = sqrt(64*17)

AB = sqrt(64)*sqrt(17)

AB = 8*sqrt(17)

AB = 32.984845

Segment AB is approximately 33 units long.

This tells us another answer is choice F. Choice C is false because 4*sqrt(5) = 8.94427

--------------

BC = BD + DC

BC = 32 + 2

BC = 34

BC is the hypotenuse of triangle ABC

Use the pythagorean theorem to determine AC.

a^2 + b^2 = c^2

(AB)^2 + (AC)^2 = (BC)^2

(sqrt(1088))^2 + (AC)^2 = (34)^2

1088 + (AC)^2 = 1156

(AC)^2 = 1156 - 1088

(AC)^2 = 68

AC = sqrt(68)

AC = sqrt(4*17)

AC = sqrt(4)*sqrt(17)

AC = 2*sqrt(17)

Another answer is Choice A. It rules out choice E because 2*sqrt(17) = 8.2462 approximately.

Please help me it’s due today!!!!

Answers

The value of x in trapezoid KFGJ is 40.

Given information:

KFGJ is a trapezoid.

KF = 20

JG = x

MN is midsegment of trapezoid KFGJ.

MN = 30

To find the value of x in trapezoid KFGJ, we can use the fact that the midsegment MN of a trapezoid is parallel to the bases and its length is equal to the average of the lengths of the bases.

In this case, MN is given as 30, and we know that KF is one of the bases with a length of 20. To find the length of the other base JG, we can use the formula for the midsegment of a trapezoid:

MN = (KF + JG) / 2

Substituting the given values, we have:

30 = (20 + x) / 2

To solve for x, we can multiply both sides of the equation by 2:

60 = 20 + x

Subtracting 20 from both sides:

x = 60 - 20

x = 40

Therefore, the value of x in trapezoid KFGJ is 40.

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Hii please answer i would appreciate it thankssss

Answers

Reason of congruency for each of the triangle are :

(a) SAS rule

(b) Triangles are not congruent.

Given are some triangles where some of the angles and sides are given to be equal.

We have to find the reason of congruency.

(a) Given two sides are equal.

One of the triangle has an included angle of 110°.

Find the included angle of the other one.

Included angle = 180 - (40 + 30) = 110°

So two sides and included angle of one is equal to the corresponding sides and angle.

So congruency is SAS rule.

(b) Length of the hypotenuse of first triangle = √(2² + 4²) = √20 cm

Length of hypotenuse of other triangle = 4 cm

The lengths are not equal.

So they are not congruent.

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unit 10 test study guide circles geometry

Answers

Circle Terminology:

Center: The point at the center of the circle.

Radius: The distance from the center to any point on the circle.

Diameter: The distance across the circle passing through the center (2 times the radius).

Chord: A line segment connecting two points on the circle.

Arc: A part of the circumference of the circle.

Sector: The region enclosed by two radii and the corresponding arc.

Circle Formulas:

Circumference (C): C = 2πr or C = πd (where r is the radius and d is the diameter).

Area (A): A = πr^2.

Central Angles and Arcs:

Central Angle: An angle whose vertex is at the center of the circle.

Arc Measure: The measure of the central angle that intercepts the arc.

Arc Length: The distance along the circumference of the circle.

Arc Length = (Arc Measure / 360) * Circumference.

Inscribed Angles and Arcs:

Inscribed Angle: An angle formed by two chords with its vertex on the circle.

Inscribed Angle Theorem: An inscribed angle is half the measure of its intercepted arc.

Intercepted Arc: The arc that lies between the endpoints of the inscribed angle.

Tangents:

Tangent: A line that intersects the circle at exactly one point (the point of tangency).

Tangent Theorem: A tangent line is perpendicular to the radius drawn to the point of tangency.

Secants:

Secant: A line that intersects the circle at two points.

Intersecting Chord Theorem: The product of the lengths of the two segments of a secant is equal to the product of the lengths of its external segment.

Relationships Between Angles and Arcs:

Angle-Arc Relationship: The measure of an inscribed angle is half the measure of its intercepted arc.

Angle in a Semicircle: An angle inscribed in a semicircle is a right angle (90 degrees).

Circle Construction:

Circumscribed Circle: A circle that passes through all the vertices of a polygon.

Incircle: A circle that is tangent to all the sides of a polygon.

Remember to practice solving problems involving these concepts, including finding angles, arc measures, lengths, and areas of circles. Additionally, review the properties and relationships between angles and arcs in different scenarios. Good luck with your study and the test!

Safiya needs to find a number that can be multiplied by 3√18
to result in a rational product.Which values could she use?

Answers

Safiya can use either ∛12 or ∛(1/6) to find a rational product when multiplied by ∛18. So, correct options are e and f.

The cube root of 18 is an irrational number because it cannot be expressed as a fraction of two integers. Safiya needs to find a rational number that, when multiplied by ∛18, results in a rational product. To do this, she needs to look for cube roots of numbers that are perfect cubes of integers.

Option a) ∛4 is a rational number, but it is not a perfect cube of any integer. Therefore, it is not a valid choice.

Option b) ∛18 is the given number and is not a perfect cube of any integer. Therefore, it is not a valid choice.

Option c) ∛3 is a rational number, but it is not a perfect cube of any integer. Therefore, it is not a valid choice.

Option d) ∛(1/18) is a rational number, but it is not a perfect cube of any integer. Therefore, it is not a valid choice.

Option e) ∛12 is a rational number and it can be expressed as ∛(2³ × 3). Therefore, it is a valid choice.

Option f) ∛(1/6) is a rational number and can be expressed as ∛(1/216). Therefore, it is a valid choice.

So, correct options are e and f.

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Can someone answer this question?

Answers

The graph of the polynomial function y = f(x) in the xy plane could be the first graph.

Given a polynomial function f.

Range of the polynomial function is the set of all the real numbers less than or equal to 4.

So y values are y ≤ 4

So the vertex of the function will be at y = 4 and other value are less than 4.

So parabola is downwards.

Two options are there with the parabola folded downwards.

Now the zeroes of f are at -3 and 1.

Zeroes of f are the values of x where the function touches the X axis.

Hence the correct graph is first one.

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subtraction property of equality
multiplication property of equality
17
3
3
4
3
X-
Step
3
X=
17 3 17
7--7-x+5-77
3
5x.-
4
4
-2/x-12x X=
1 2
X= X-
2
X=-
4
5
-
-
X=
division property of equality
X+5
2
-/3/33
addition property of equality
2
3
8
15
-²333
x-²/3-1/2 x
-
17
4
5
3
given
simplification
Justification

Answers

The required justification for the solution to the equation is shown in the solution part.

As per the given equation, the required solution would be as follows:

Given:

17/3 - (3/4)x = 1(/2)x + 5

Subtraction property of equality:

17/3 - (3/4)x - 17/3 = 1(/2)x + 5 - 17/3

- (3/4)x =  1(/2)x - 2/3

Addition property of equality:

- (3/4)x - 1(/2)x =  1(/2)x - 2/3 - 1(/2)x

-(5/4)x = -2/3

Multiplication property of equality:

-(5/4)x × -4/5 = -2/3 × -4/5

Simplification:

x = 8/15

The required justification for the solution to the equation is shown in the solution part.

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Answer:

Answer shown in picture.

Need help in solving this problem I’m stuck on it. Pls help me?????? If you can see the numbers it’s 3ft, 7ft, 5ft, 4ft.

Answers

Answer:

area=20ft^2

Step-by-step explanation:

3ft×4ft=12ft^2

12ft÷2=6ft is the area of the smaller triangle

7ft×4ft=28ft^2

28ft÷2=14ft is the area of the larger triangle

6ft+14ft=20ft^2

I’m particularl class of 33 students, 14 are men. What fraction of the students in the class are men?

Answers

_____________________________

= 14 ÷ 33 × 100= 42.4% ~ 43% The Fraction of Male Students Is 43%

_____________________________

Step-by-step explanation:

the headline says "college". that cannot be.

14 out of 33 are men.

so,

14/33 of the students are men.

that's it. nothing else can be done.

let's add a little bit more spice to this and ask also what percentage of the students are men :

for % questions, always find 100% and correspondingly 1%.

everything else can be easily calcite out of this.

100% = 33

1% = 100%/100 = 33/100 = 0.33

how many % of these 33 are 14 ?

as many as times 1% fit into these 14 :

14/0.33 = 42.42424242...%

please answer all 3 and show work

Answers

The equation of the Damari's investment is B(x) = 30000 * 1.03ˣ

Sky's family should take the offer of $5000 for the boatThe rule of the function is f(x) = 8 * 0.6ˣ

Calculating the equations of the functions

Damari's investment

Given that

Initial value, a = 30000

B(3) = 32306.72

The function is calculated as

B(x) = a * bˣ

Using B(3), we have

30000 * b³ = 32306.72

So, we have

b³ = 1.077

Take the cube root of both sides

b = 1.03

So, we have

B(x) = 30000 * 1.03ˣ

So, the function is B(x) = 30000 * 1.03ˣ

The boat of Sky's family

Here, we have

Initial value = 6000

Rate of depreciation = 6%

So, the function is

f(x) = 6000 * (1 - 6%)ˣ

So, we have

f(x) = 6000 * (0.94)ˣ

In 2024, we have

x = 2024 - 2021

x = 3

So, we have

f(3) = 6000 * (0.94)³

Evaluate

f(3) = 4983.50

This value is less than the offered value of $5000

This means that Sky's family should take the offer

The rule of the function

Here, we have the graph

From the graph, we have

Initial value, a = 8

Rate, b = 4.8/8

So, we have

Rate, b = 0.6

So, the function is

f(x) = 8 * 0.6ˣ

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Mrs. Sarfo is now three times as old as his daughter Joyce. If the sum of their ages 8 years ago was 48, find the girls present age​

Answers

If  the sum of their ages 8 years ago was 48 then the present age​ of girl is 16 years.

Mrs. Sarfo is three times as old as her daughter, so her present age would be 3J years.

8 years ago, Joyce's age would have been J - 8, and Mrs. Sarfo's age would have been 3J - 8.

The sum of their ages 8 years ago was 48:

(J - 8) + (3J - 8) = 48

Simplifying the equation:

4J - 16 = 48

Adding 16 to both sides:

4J = 64

Dividing both sides by 4:

J = 16

Therefore, the present age of Joyce is 16 years.

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Can someone answer this question

Answers

The coefficients used to perform the synthetic division are given by the first option in this problem.

How to apply the synthetic division algorithm?

In the synthetic division algorithm, the coefficients of a polynomial, which is the dividend, are each divided by a value.This divisor is the goes into the far left box.

The standard format of the polynomial in this problem is given as follows:

[tex]6x^4 - 7x^3 + x^2 + 3[/tex]

Considering that x has a coefficient of zero, the order of the coefficients of  the polynomial function is given as follows:

6, -7, 1, 0 and 3.

The divisor is of:

x + 4.

Hence the term on the left box is of:

x + 4 = 0 -> x = -4.

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PLEASE HELP ME!!!!! The cost that a carpet cleaning company charges is directly proportional to the number of rooms cleaned. The cost is $22 for each room.
(a) Write a direct variation equation to represent the cost.
(b) How many rooms can a hotel pay the company to clean for $200? Write and solve an equation.
(c) Suppose the hotel plans to tip the carpet cleaners $40, how many rooms can the hotel get cleaned for $200 now? Write and solve an equation.

Answers

Answer:

Step-by-step explanation:

Does anybody know this? I feel like it it's easy but I can't seem to get it. Find the common difference of the arithmetic sequence -3.6,-3.9,-4.2,-4.5

Answers

Answer: Looks like its -.3

Answer:

Step-by-step explanation:

-3.6 + -0.3 = -3.9

-3.9 + -0.3 = -4.2

-4.2 + -0.3 = -4.5

you are adding - 0.3 to each number to get the next number in the sequence

=

+

how are the shapes alikei need to know

Answers

The similarity between the cube and cuboid is that both have 12 edges.

option C.

What is a cube and cuboid?

A cube is a solid three-dimensional figure, which has 6 square faces, 8 vertices and 12 edges.

So a cube is a three-dimensional solid figure, having 6 square faces and 12 edges.

A cuboid is a three-dimensional geometric shape that looks like a book or a rectangular box.

A cuboid can be defined as a three-dimensional solid shape that has 12 edges, 8 vertices, and 6 faces and each of its faces is rectangular in shape.

So the similarity between a cube and cuboid is that both have 6 faces and 12 edges.

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Find value of X. Round to the nearest tenth. right Triangle 36° , 10, x

●Problem #8 ​

Answers

Answer:

x ≈ 8.1

Step-by-step explanation:

using the cosine ratio in the right triangle

cos36° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{x}{10}[/tex] ( multiply both sides by 10 )

10 × cos36° = x , then

x ≈ 8.1 ( to the nearest tenth )

The radius of a circle is 14 yards. What is the circle's circumference?
Use 3.14 for ​.

pls help

Answers

2.54 is about how old I am right now actually more like2.56.2

principal $45,687.23 annual interest rate 7.555% interest period monthly. What is the first period interest?

Answers

The interest rate for the first period is $287.22

Using the Simple Interest Principle

To obtain the first period interest, we use simple interest formula;

Simple Interest = Principal * Rate * Time

Given:

Principal = $45,687.23

Annual interest rate = 7.555%

Interest period = Monthly

Convert the annual interest rate to a monthly interest rate.

Monthly interest = Annual interest/ 12 = 7.555/12 = 0.6295%

First period interest:

Interest = Principal * Monthly interest rate * Time

Since it's the first period, the time is 1 month:

Interest = $45,687.23 * 0.62958333% * 1

Interest = $45,687.23 * 0.0062958333

Interest ≈ $287.22

Therefore, the first period interest is $287.22.

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10. Find measure of arc JK
pls help ASAP

Answers

The value of arc JK is determined as arc JK = 28⁰.

What is the value of arc JK?

The value of arc JK is calculated by applying intersecting chord theorem, which states that the angle at tangent is half of the arc angle of the two intersecting chords.

Also this theory states that arc angles of intersecting secants at the center of the circle is equal to the angle formed at the center of the circle by the two intersecting chords.

arc JK =  m∠JNK

From the diagram, we have N = 152⁰

m∠JNK = ¹/₂ ( 360 - (152 + 152) (sum of angles at a point)

m∠JNK = 28⁰

The value of arc JK is calculated as follows;

arc JK = 28⁰

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List all numbers from the given set that are a. natural​ numbers, b. whole​ numbers, c.​ integers, d. rational​ numbers, e. irrational​ numbers, and f. real numbers.

Answers

a. Natural numbers: 0, 4.2, √9

b. Whole numbers: -8, 0, 4.2, √9

c. Integers: -8, 0, 4.2, √9

d. Rational numbers: -8, 5/6, 0, 4.2, √9

e. Irrational numbers: √2, π

f. Real numbers: -8, 5/6, 0, 0.1, √2, π, 4.2, √9

We have,

a. Natural numbers:

5/6, 0, 4.2, √9 (The natural numbers are positive integers excluding zero)

b. Whole numbers:

-8, 0, 4.2, √9 (Whole numbers include zero and all positive integers)

c. Integers:

-8, 0, 4.2, √9 (Integers include positive and negative whole numbers, including zero)

d. Rational numbers:

-8, 5/6, 0, 4.2, √9 (Rational numbers can be expressed as a fraction of two integers)

e. Irrational numbers:

√2, π (Irrational numbers cannot be expressed as a fraction and have non-repeating, non-terminating decimal expansions)

f. Real numbers:

-8, 5/6, 0, 0.1, √2, π, 4.2, √9 (Real numbers include all rational and irrational numbers)

Thus,

a. Natural numbers: 0, 4.2, √9

b. Whole numbers: -8, 0, 4.2, √9

c. Integers: -8, 0, 4.2, √9

d. Rational numbers: -8, 5/6, 0, 4.2, √9

e. Irrational numbers: √2, π

f. Real numbers: -8, 5/6, 0, 0.1, √2, π, 4.2, √9

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The complete question.

-8, 5/6, 0, 0.1, √2, π, 4.2, √9

List all numbers from the given set that are a. natural​ numbers, b. whole​ numbers, c.​ integers, d. rational​ numbers, e. irrational​ numbers, and f. real numbers.

Please help me understand this problem!

Answers

The values of c  on the interval [-5, 5] are c = -[tex]5^{1/4[/tex]) and c = [tex]5^{1/4[/tex].

According to the Mean Value Theorem for Integrals, if f(x) is continuous on the interval [a, b], then there exists a value c in [a, b] such that:

f(c) = 1/(b-a) . ∫(a to b) f(x) dx

For f(x) = x⁴ on the interval [-5, 5], we have:

∫(-5 to 5) x⁴ dx = (1/5) . (5⁵ - (-5)⁵)/5

= (1/5) . (3125 + 3125)

= 1250

So we need to find c such that f(c) = 1250/10 = 125.

f'(x) = 4x³, so we can use the Mean Value Theorem for Derivatives to find a value of c that satisfies the condition.

f'(c) = (1/(5-(-5)))  . ∫(-5 to 5) f'(x) dx

= (1/10)  . [f(5) - f(-5)]

= (1/10) . [(5⁴) - ((-5)⁴)]

= 100

Therefore, by the Mean Value Theorem for Derivatives, there exists a value c in [-5, 5] such that f'(c) = 100.

Now, we need to check if there exists a value c in [-5, 5] such that f(c) = 125.

f(c) = c⁴, so we need to solve the equation c⁴ = 125.

c = ±[tex]5^{1/4[/tex]

Both of these values are in the interval [-5, 5], so they satisfy the Mean Value Theorem for Integrals.

Therefore, the values of c that satisfy the Mean Value Theorem for integrals for f(x) = x⁴ on the interval [-5, 5] are c = -[tex]5^{1/4[/tex]) and c = [tex]5^{1/4[/tex].

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zeus industries bought a conputer for $2500. it is ecpected to depreciate at a eate of 20% per year. what will the e value of the computers be in 2 years

Answers

Answer: Let me explain!

Step-by-step explanation:

Well, this is easy, I’ll explain it.
We know the value of these computers are going to go down 20% each year. So since we know that, we can multiply 20 percent by the amount of years, which is 2, so 20 times 2 is 40, so the computers decreased in value by 40 percent!

Now that that’s established, we need to subtract forty percent of 2500, from the original price, 2500.

(To do that, move the decimal place over one to get 250, which is 10%, then multiply by 4, to get 40 percent of 2500, which is 1000, in case you weren’t sure on how to do that :)

Then, subtract 1000 from 2500, and that is your answer!

$1,500

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