Question 1

The mean price of all magazines published in the United States is $3.65.The mean price of a random sample of 16 magazines is $4.30.The sampling error is:

Accepted Answer

The answer of The mean price of all magazines published...

Question 2

All 1,035 members at a country club take part in a contest to see who can drive a golf ball the farthest.Each member takes three swings,and his/her best drive is entered into the contest.The distances of the drives entered into the contest have a mean of 188.3 yards and a standard deviation of 16.2 yards.You select a sample of 43 drives,what is the probability,rounded to four decimal places,that the mean of the sample exceeds 192 yards?

Accepted Answer

The answer of All 1,035 members at a country club...

Question 3

The mean weekly earnings of all employees of a company are $822.The mean weekly earnings of a random sample of 25 employees selected from this company is $837.The difference ($837 - $822 = $15)is the:

Accepted Answer

A) probability error 
B) nonsampling error 
C) sampling error 
D) population error

Question 4

The sampling error is:

Accepted Answer

A) an error that occurs during collection,recording,and tabulation of data 
B) the difference between the value of a sample statistic and the value of the corresponding population parameter 
C) an error that occurs when a sample of fewer than 30 members is drawn 
D) an error that occurs when a sample of 30 or more members is drawn

Question 5

A continuous random variable x has a left-skewed distribution with a mean of 130 and a standard deviation of 22.The sampling distribution of the sample mean for a sample of 16 elements taken from this population is:

Accepted Answer

A) approximately normal 
B) normal 
C) skewed to the right 
D) skewed to the left

Question 6

A continuous random variable x has a right-skewed distribution with a mean of 80 and a standard deviation of 12.The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:

Accepted Answer

A) approximately normal 
B) not normal 
C) skewed to the right 
D) skewed to the left

Question 7

The weights of all babies born at a hospital have a mean of 7.3 pounds and a standard deviation of 0.65 pounds.The mean of the sampling distribution of the mean weight of a sample of 41 babies born at this hospital is:

Accepted Answer

The answer of The weights of all babies born at...

Question 8

A continuous random variable x has a normal distribution with a mean of 65 and a standard deviation of 21.In the sampling distribution of the sample mean for a sample of 25 elements,what is the z-score for a sample mean of 68.36?

Accepted Answer

The answer of A continuous random variable x has a...

Question 9

Use the following to answer questions :
A study shows 18.0% of all adult males did not visit their physicians' offices last year.A sample of 623 adult males is selected.
-The probability that more than 18% of adult males in the sample did not visit their physicians' offices last year,rounded to four decimal places,is approximately:

Accepted Answer

The answer of Use the following to answer questions :
A...

Question 10

The standard deviation of the sampling distribution of the sample mean for a sample size of n drawn from a population with a mean of  and a standard deviation of  is:

Accepted Answer

A)   
B)   
C)   
D)

Question 11

The sampling distribution of the sample proportion is approximately normal if:

Accepted Answer

A) n is greater than or equal to 30 
B) np and nq are both greater than 10 
C) np and nq are both greater than 5 
D) np and nq are both less than 5

Question 12

Suppose the number of books consulted by a student last weekend has distribution Let X₁ and X₂ be independent and each have the same distribution as the population. Determine the missing elements in the table for the sampling distribution of .

Accepted Answer

The answer of Suppose the number of books consulted by...

Question 13

To apply the Central Limit Theorem to the sampling distribution of the sample mean,the required sample is typically large enough if:

Accepted Answer

A) n is greater than 50 
B) n is 50 or less 
C) n is less than 30 
D) n is 30 or larger

Question 14

A continuous random variable x has a normal distribution with a mean of 90 and a standard deviation of 15.The sampling distribution of the sample mean for a sample of 16 elements taken from this population is:

Accepted Answer

A) not normal 
B) normal 
C) skewed to the right 
D) skewed to the left

Question 15

A company has 411 employees and 104 of them are college graduates.The proportion of employees of this company who are college graduates,rounded to three decimal places,is:

Accepted Answer

The answer of A company has 411 employees and 104...

Question 16

An error that occurs because of human mistakes is called:

Accepted Answer

A) nonsampling error 
B) sampling error 
C) mean error 
D) probability error

Question 17

In the case of proportion,the sample size is large if:

Accepted Answer

A) n is greater than or equal to 30 
B) np and nq are both less than 5 
C) n is less than 30 
D) np and nq are both greater than 5

Question 18

A continuous random variable x has a right-skewed distribution with a mean of 45 and a standard deviation of 6.The sampling distribution of the sample mean for a sample of 25 elements taken from this population is:

Accepted Answer

A) approximately normal 
B) normal 
C) skewed to the right 
D) skewed to the left

Question 19

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample,the dividend is the:

Accepted Answer

A) sample mean 
B) sample proportion 
C) sample distribution 
D) sampling distribution

Question 20

Use the following to answer questions :
Forty percent of all students at a large university live on campus.Suppose you extract a sample of 115 students from this university.The sample proportion is the proportion of students in this sample who live on campus.
-The mean of the sampling distribution of this sample proportion is:

Accepted Answer

The answer of Use the following to answer questions :
Forty...

Exam 7: Sampling Distributions

The mean price of all magazines published in the United States is $3.65.The mean price of a random sample of 16 magazines is $4.30.The sampling error is:

The mean weekly earnings of all employees of a company are $822.The mean weekly earnings of a random sample of 25 employees selected from this company is $837.The difference ($837 - $822 = $15) is the:

The sampling error is:

A continuous random variable x has a left-skewed distribution with a mean of 130 and a standard deviation of 22.The sampling distribution of the sample mean for a sample of 16 elements taken from this population is:

A continuous random variable x has a right-skewed distribution with a mean of 80 and a standard deviation of 12.The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:

The weights of all babies born at a hospital have a mean of 7.3 pounds and a standard deviation of 0.65 pounds.The mean of the sampling distribution of the mean weight of a sample of 41 babies born at this hospital is:

A continuous random variable x has a normal distribution with a mean of 65 and a standard deviation of 21.In the sampling distribution of the sample mean for a sample of 25 elements,what is the z-score for a sample mean of 68.36?

The standard deviation of the sampling distribution of the sample mean for a sample size of n drawn from a population with a mean of and a standard deviation of is:

The sampling distribution of the sample proportion is approximately normal if:

Suppose the number of books consulted by a student last weekend has distribution Let X₁ and X₂ be independent and each have the same distribution as the population. Determine the missing elements in the table for the sampling distribution of .

To apply the Central Limit Theorem to the sampling distribution of the sample mean,the required sample is typically large enough if:

A continuous random variable x has a normal distribution with a mean of 90 and a standard deviation of 15.The sampling distribution of the sample mean for a sample of 16 elements taken from this population is:

A company has 411 employees and 104 of them are college graduates.The proportion of employees of this company who are college graduates,rounded to three decimal places,is:

An error that occurs because of human mistakes is called:

In the case of proportion,the sample size is large if:

A continuous random variable x has a right-skewed distribution with a mean of 45 and a standard deviation of 6.The sampling distribution of the sample mean for a sample of 25 elements taken from this population is:

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample,the dividend is the:

Exam 7: Sampling Distributions

The mean price of all magazines published in the United States is $3.65.The mean price of a random sample of 16 magazines is $4.30.The sampling error is:

The mean weekly earnings of all employees of a company are $822.The mean weekly earnings of a random sample of 25 employees selected from this company is $837.The difference ($837 - $822 = $15) is the:

The sampling error is:

A continuous random variable x has a left-skewed distribution with a mean of 130 and a standard deviation of 22.The sampling distribution of the sample mean for a sample of 16 elements taken from this population is:

A continuous random variable x has a right-skewed distribution with a mean of 80 and a standard deviation of 12.The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:

The weights of all babies born at a hospital have a mean of 7.3 pounds and a standard deviation of 0.65 pounds.The mean of the sampling distribution of the mean weight of a sample of 41 babies born at this hospital is:

A continuous random variable x has a normal distribution with a mean of 65 and a standard deviation of 21.In the sampling distribution of the sample mean for a sample of 25 elements,what is the z-score for a sample mean of 68.36?

The standard deviation of the sampling distribution of the sample mean for a sample size of n drawn from a population with a mean of and a standard deviation of is:

The sampling distribution of the sample proportion is approximately normal if:

Suppose the number of books consulted by a student last weekend has distribution Let X1 and X2 be independent and each have the same distribution as the population. Determine the missing elements in the table for the sampling distribution of .

To apply the Central Limit Theorem to the sampling distribution of the sample mean,the required sample is typically large enough if:

A continuous random variable x has a normal distribution with a mean of 90 and a standard deviation of 15.The sampling distribution of the sample mean for a sample of 16 elements taken from this population is:

A company has 411 employees and 104 of them are college graduates.The proportion of employees of this company who are college graduates,rounded to three decimal places,is:

An error that occurs because of human mistakes is called:

In the case of proportion,the sample size is large if:

A continuous random variable x has a right-skewed distribution with a mean of 45 and a standard deviation of 6.The sampling distribution of the sample mean for a sample of 25 elements taken from this population is:

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample,the dividend is the:

Suppose the number of books consulted by a student last weekend has distribution Let X₁ and X₂ be independent and each have the same distribution as the population. Determine the missing elements in the table for the sampling distribution of .