Under which circumstances should you use a two-population z test?
The standard deviation is unknown
The sample size is less than 30
The population is slightly skewed and n> 40
The standard deviation is known and n> 30

Answers

Answer 1

the statement "The standard deviation is known and n > 30" is the correct circumstance under which a two-population z-test should be used.

A two-population z-test is typically used to compare the means of two independent populations when the sample size is large (n > 30) and the population standard deviation is known.

If the population standard deviation is unknown, a two-population t-test can be used instead. If the sample size is less than 30, a two-population t-test should be used regardless of whether the population standard deviation is known or unknown.

If the population is slightly skewed and n > 40, a two-population z-test may still be used if the sample size is large enough to meet the normality assumption of the sampling distribution of the means. However, in practice, it is recommended to use a t-test instead if the sample size is not too large (less than a few hundred).

To learn more about standard deviation visit:

brainly.com/question/23907081

#SPJ11


Related Questions

Which statement is true about the slope of the graphed line?
A. The slope is negative
B. The slope is positive
C. The slope is zero
D. The slope is undefined

Answers

Answer:

The answer is B, the slope is positive.

Answer: B, the slope is positive.

Step-by-step explanation:

The slope is positive because it is going upwards from left to right.

Having trouble solving this:

Answers

Answer:

option c.

1/100

.........................

Answer:

0.01= [tex]\frac{1}{100}[/tex]

Question 1 of 5
What is the circumference of a circle with a diameter of 6 feet? Use 3.14 for tt.

A. 18.84 ft

B. 28.26 ft

C. 37.68 ft

D. 9.42 ft

Answers

The Answer for your problem is A

Answer:

The answer is A. 18.84

Step-by-step explanation:

Hope this helps =)

Which coordinates represent a translation of B(1, 2) 3 units to the left and 2 units up?

B′(–2, 0)

B′(–2, 4)

B′(4, 4)

B′(4, 0)

Answers

Answer:

(-2,4)

Step-by-step explanation:

B(1,2)

(x-3, y+2)

1-3=-2

x=(-2)

2+2=4

y=4

Hope this helps! :)

Answer:

B'(-2, 4)

Step-by-step explanation:

If it goes 3 units left, that means you're doing x - 3.

If it goes 2 units up that means you're doing y + 2 This would be:

(1 - 3, 2 + 2)

(-2, 4)

Which equation represents the line that passes through the point (1, 5) and has a slope of -2?

Answers

Answer:

y=-2x+7

Step-by-step explanation:

y-y1=m(x-x1)

y-5=-2(x-1)

y=-2x+2+5

y=-2x+7

banda ayudenme con este punto de una tarea es sobre la sustracción de números enteros
19 - ( - 12 )
- 6 - ( - 27 )
( -18 ) - 4
( - 82 ) - 9
18 - ( - 2 )
( - 12 ) - ( - 11 )

LA RESPUESTA YA LA SE LO Q NECESITO ES EL PROCEDIMIENTO!! gracias :3​

Answers

Answer:

Step-by-step explanation:

19-(-12)=19+12=31

-6-(-27)=-6+27=21

(-18)-4=-18-4=-22

(-82)-9=-82-9=-91

18-(-2)=18+2=20

(-12)-(-11)=-12+11=-1

The last one is the answer i think

On a coordinate map of Melville, a restaurant is located at (-6,-5). A laundry business is located 3 units to
the left of the restaurant on the map.
What are the map coordinates of the laundry business?
The coordinates of the laundry business are

Answers

Answer:

(-9, -5)

Step-by-step explanation:

show your work plzzz i will give you the points

Answers

Answer:

I do not see a problem.

Step-by-step explanation:

Thanks for the points.

a milk tank at a a dairy farm has the form of a rectangular prism. The tank is 3.5 feet wide. The width of the tank is 5/7 of its length and the height is 4/5 of its width. How many cubic feet of milk can the tank hold. How many pounds of milk can it hold if 1 cubic foot of milk weights 66.5 lb

Answers

Answer:

17.5 cubic feet

1163.75 pounds

Step-by-step explanation:

Givens

L = 3.5                                    Given

W = 5/7  *  3.5                        Divide by 7

W = 5 * 0.5                             Combine

W = 2.5

H = 4/5 * w

H = 4/5 * 2.5

H = 4 * 0.5

H = 2

Volume

V = L * w * h

V = 3.5 * 2.5 * 2

V = 17.5

Weight

1  Cubic foot Milk = 66.5 pounds

17.5 cubic feet milk = x

1 / 17.5 = 66.5/ x

x = 17.5 * 66.5

x = 1164.75

Answer:

1163.75lbs

Step-by-step explanation:

Help please answer fast!!!

Answers

Answer: -3.5

Step-by-step explanation:

tell if im wrong

Answer:it would be 7.5

Step-by-step explanation:-2.5 + 2.5 = 0 0+2.5=2.5 2.5+2.5=4.5 so it would be 2.5+2.5+2.5=7.5

is 14/18 greater then, less then, or equal to 7/9

Answers

Answer:

Equal to

Step-by-step explanation:

14/18 is just 7/9 but with the numerator and denominator multiplied by 2

Answer:

equal to

Step-by-step explanation:

14/18 simplified is 7/9

so 7/9=7/9

Find the least common multiple (LCM) of 6 and 10

Answers

Answer:

30

Step-by-step explanation:

Multiples of 6 are 6,12,18,24,30.

Multiples of 10 are 10,20,30.

30 is the number they both have in common first. 30 is the LCM.

Hope this helps!

The least common multiple (LCM) of 6 and 10 is 20

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

6 and 10

The multiples of 6 are 6, 12, 18, 24, 30, 36, ...

The multiples of 10 are 10, 20, 30, 40, 50, 60,...

Now,

The least common multiple (LCM) of 6 and 10.

= 30

Thus,

30 is the LCM of 6 and 10.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ5

help!!!!!!!!
5x^2 - 35x+50/x^2-x-20

also here is something cute.......... a munchkin cat

Answers

Answer:

funny

Step-by-step explanation:

funny

help PLEASE!!! [URGENT]

Answers

The answer is c because its c

solve for x and find x ​

Answers

Answer:

x = 24

Step-by-step explanation:

Because this shape is a parallelogram, the line segment measuring 6x must be equal to the line segment on the other side of E, which measures 144 units. 144 ÷ 6 = 24

If the sum of the measures of the three angles shown is 163°, what is the measure of ZCEB? I need help ASAP!!!!

Answers

Answer:

24 degree

Step-by-step explanation:

sum of all three angles = 163

x + 4x + 2x + 5 - 10 = 163

7x - 5 = 163

7x = 163 + 5

x = 168/7

x = 24

Answer:

24 degree

Step-by-step explanation:

Which expression is equivalent to |a|≤5 ?


a ≥ –5 or a ≤ 5


a ≥ –5 and a ≤ 5


a ≤ –5 and a ≥ 5


a ≤ –5 or a ≥ 5

Answers

Answer:

The answer would be a>-5 or a< 5

Step-by-step explanation:

I hope this helps, let me know if i'm incorrect

Evaluate the expression for the given value of the variable.

6 × (h + 4) for h = 3

The answer is

Answers

Answer:

42

Step-by-step explanation:

6*(3+4)6*7

42

Answer:

42

Step-by-step explanation:

[tex]6 \times 3 + 6 \times 4 \\ 18 + 24 = 42[/tex]

Use the Pythagorean theorem to find the distance from Emma’s house to the pool.

Answers

Pythagorean theorem:  [tex]a^{2} +b^{2} =c^{2}[/tex]

When rewritten for coordinates plane:

[tex]d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}[/tex]

where d is distance and (x,y) are the points.

Write down the coordinates of Emma's house and The Pool.

It is (-5,-3) and (2,2).

Substitute the numbers.

[tex]d=\sqrt{(2-(-3))^{2}+(2-(-5))^{2}}[/tex]

Calculate.

[tex]d=\sqrt{(5)^{2}+(7)^{2}}[/tex]

You should get [tex]\sqrt{74}[/tex] as your answer.

SI UN NUMERO SE MULTIPLICA POR 7, EL RESULTADO ES IGUAL AL NUMERO AUMENTADO EN 24. ¿ CUAL ES EL NUMERO? 7 . X : X + 24

Answers

Answer: El número es 4.

Step-by-step explanation:

Sea X un número.

Acá tenemos:

"Si un número se multiplica por 7"

Esto se escribe como 7*X

"... El resultado es igual al número aumentado en 24"

Esto lo podemos escribir como:

7*X = X + 24

Ahora debemos resolver esta ecuación para X.

7*X = X + 24

Primero, debemos llevar todos los términos con X al mismo lado de la ecuación, para hacer esto, podemos restar X en ambos lados:

7*X - X = (X + 24) - X

6*X = 24

Ahora debemos dividir ambos lados por 6.

6*X/6 = 24/6

X = 4

El número es 4.

Se lanzan 7 volados consecutivos y en todos ellos ha caído águila. ¿Cuál es la probabilidad de que en el décimo volado también caiga águila? En todos los eventos la probabilidad ha sido ½; por lo cual, en el décimo volado sigue la misma probabilidad 1/2

Answers

Respuesta: 0.5

Explicación paso a paso:

El posible resultado es 2:

1.) que cae un águila

2.) que un águila no cae

Cada resultado posible con igual probabilidad:

Probabilidad = resultado requerido / resultados posibles totales

P (cae un águila) = 1/2

P (el águila no cae) = 1 - 1/2 = 1/2

Por lo tanto, la probabilidad de que un águila caiga en la décima mosca es la misma que las probabilidades previas de que un águila caiga o no y es independiente. El hecho de que el águila haya caído en siete moscas consecutivas no aumenta la probabilidad de que el águila haya caído en la décima mosca.

use the communitive property of addition to rewrite 3 + 5 + 7. Which expression is equivalent?

Answers

Answer: 8+7

Step-by-step explanation: 3+5+7 is equivalent to 8+7 because if you add the both of them you’ll get the same exact answer which is 15

Marlye asked students in her school whether they prefer scary movies or comedies she found out that 35 students liked scared movies and 65 likes comidies what percent prefier scary movies

Answers

Answer:Percentage of students who prefer scary movies =35%

Step-by-step explanation:

Number of students who prefer scary movies= 35

Number  of students who love comedies= 65

Total number of students = 65 +35= 100

Percentage of students who prefer scary movies = Number students who prefer scary movies/ total number of students x 100

35/ 100 x 100

0.35 x 100= 35%

How to find the volume of a cone?

Answers

Use the formula, R being for radius and H for height

HOW PLEASE EXPLAIN TOO WITH ANSWER

Answers

Answer:

y = -2x + 3

Step-by-step explanation:

5 x -2 + 3 = -7

3 x -2 + 3 = -7

9 x -2 + 3 = 1

-3 x -2 + 3 = 9

You just have to test all of the options, everything, out and pick what fits.

Hope that helps!

The answer is the second question: y=-2x+3.

Explanation:

You will have to try to substitute the numbers shown in the table with the 4 equations. And see which equation satisfies all the expressions in the table.

y = -2x + 3

Sub x = 5 and y = -7,
-7 = -2(5) + 3
-7 = -10 + 3
-7 = -7
(x=5 and y=-6 satisfies the equation y=-2x+3)

Sub x=3 and y=-3,
-3 = -2(3) + 3
-3 = -6 + 3
-3 = -3
(x=3 and y=-3 also satisfies the equation y=-2x+3)


Same goes for all the other numbers...

Hope it helps :)

Find the area of the shape shown below

Answers

Answer: 15

Step-by-step explanation:

3*3=9

4*3/2=6

9+6=15

Answer:

The area is 15 units squared

Sofia made 10% of her free throws over the season. If she shot 160 free throws, how many did she make?

Answers

Answer:

16

Step-by-step explanation:

160 * 10% = 16

160 * 0.1 = 16

I have to solve this
4x-5=2-x​

Answers

Answer:x=7/5

Step-by-step explanation:

Answer:

x= [tex]\frac{7}{\\5}[/tex]

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

4x−5=2−x

4x+−5=2+−x

4x−5=−x+2

Step 2: Add x to both sides.

4x−5+x=−x+2+x

5x−5=2

Step 3: Add 5 to both sides.

5x−5+5=2+5

5x=7

Step 4: Divide both sides by 5.

[tex]\frac{5x}{5}[/tex]  = [tex]\frac{7}{5}[/tex]

SOMEONE PLEASE HELP ME AND ANSWER THIS QUESTION CORRECTLY I WILL MAKE YOU THE BRAINLIEST, GIVE YOU A GOOD RATE, PLEASE ASWER THIS ASAPPPPPPPPP!!!!!!!!!!! I NEED HELP ASAPPPPPPPPPPP!!!!!!!!!!

Answers

Answer:

30  10  4

Step-by-step explanation:

Give Brainliest

Are 4x and 15 + x equivalent expressions? EXPLAIN

I need help FAST!

Answers

Answer:

x=5

Step-by-step explanation:

Step 1: you want to have x alone on one side so I will subtract one x from both sides (to remove the 1 x on the right side). Now we're left with 3x=15.

Step 2: Divide both sides by 3 (to remove the 3 in front of 3x). Now we have x=5.

Other Questions
Why do sociologists consider the "scientific" racial types of Caucasian, Mongoloid, and Negroid to be misleading and even harmful?a. Every society's population contains a lot of genetic mixture.b. Various racial categories are genetically very much alike.c. The skin color of Caucasian people ranges from very light to very dark. What are three methods or technologies the Damasios use to study brain injuries? Research focused on studying the brain structures of individuals with asd is beginning to make progress due to current sourcing devices switch the side of the dc output to control the load is called an ftd ad shows a woman holding a very large vase of flowers. the background is red and the only text in the ad is ""mother's day."" what type of ad is this? 3. explain why the red cabbage acid-base indicator from the previous ph lab would not work as the indicator for a titration a 2's complement module. name this module twocmp.v. this takes a 4bit number as input and gives the 2's complement of the number as output. narrative essay the best story your grandmother taught me 10) In a species of cactus, the number of spines on a plant is genetically determined. The graph above showsfrequency distributions for populations of the cactus species growing in the presence or absence of two herbivores:peccaries (a New World pig) and wasp larvae. Which of the following best accounts for the different frequencydistributions in the graph?Number of Cacti(A) Peccaries eat cacti with the greatest number of spines, and wasp larvae show no preference with respect tospine number.(B) Peccaries eat cacti with a smaller number of spines, and wasp larvae eat cacti with a greater number of spines.(C) Wasps have increasing difficulty depositing eggs on cacti with more spines, and peccaries show no preferencewith respect to spine number.(D) Both peccaries and wasp larvae will eat the most abundant types of cacti, which are the plants with the greatestnumber of spines. blank checks group of answer choices should be safeguarded. should be pre-signed. do not need to be safeguarded since they must be signed to be valid. should not be pre-numbered. d. explain the notion of a context switch. what would happen if the context switch time were too long? discuss your arguments. explain why the context switch time is considered overhead. give examples balance the following reaction in basic conditions and answer the following questions: ca2 (aq) c(s) clo2 (g) caco3(s) clo2 (aq) what is the oxidation state of c in caco3(s)? This week laptops are 25% off the original price. If the original price of a laptop was $300, what is the new sale price? In response to the argument that biomedical enhancements threaten to undermine a properappreciation for what we have, Buchanan says that such appreciation:Is a virtue and we should be cautious about new technologies that threaten to undermine it.Is not a virtue, so there is no worry of enhancement technologies threatening to undermine it.Is a vice because it tends to make us lazy and unproductive.Is a vice because we have a moral duty to continually strive to improve ourselves.Is a character trait that we want other people to have, but not ourselves to have. What is the typical relationship between a person's network size and the number of job leads they have?a. The smaller the network, the more job leads availableb. The larger the network, the more job leads availablec. The larger the network, the fewer job leads availabled. None of the abovePlease select the best answer from the choices providedO ABOOOOD for most companies, each intermediary in a channel adds its own markup to products, which creates a link among channel length, the final selling price, and the company's An investor purchases a long call at a price of $3.00. The exercise price is $45. If the current stock price is $45.10, what is the break-even point for the investor? O $48.10 $48.00 $45.00 $42.00 Kennedy's advisors suggested that he adopt a policy of ____________ when dealing with our country's enemies. A. Using nuclear weapons. B. Not doing anything. C. Flexible response. D. First strike evaluate the integral. 6 (x2 2x 7) dx 4 Which of the following statements is true about why spiders are not classified into insects?(a) Spiders are venomous(b) Spiders have eight legs(c) Spiders have 2 division in their bodies(d) All of the above