Question 1

The sampling distribution of the sample means

Accepted Answer

A)  is the probability distribution showing all possible values of the sample mean. 
B)  is used as a point estimator of the population mean μ. 
C)  is an unbiased estimator. 
D)  shows the distribution of all possible values of μ. 
A)  is the probability distribution showing all possible values of the sample mean. 
B)  is used as a point estimator of the population mean μ. 
C)  is an unbiased estimator. 
D)  shows the distribution of all possible values of μ.

Question 2

A finite population correction factor is needed in computing the standard deviation of the sampling distribution of sample means

Accepted Answer

A)  whenever the population is infinite. 
B)  whenever the sample size is more than 5% of the population size. 
C)  whenever the sample size is less than 5% of the population size. 
D)  irrespective of the size of the sample. 
A)  whenever the population is infinite. 
B)  whenever the sample size is more than 5% of the population size. 
C)  whenever the sample size is less than 5% of the population size. 
D)  irrespective of the size of the sample.

Question 3

Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. The mean and the standard deviation of the sampling distribution of the sample means are

Accepted Answer

A)  8.7 and 1.94. 
B)  36 and 1.94. 
C)  36 and 1.86. 
D)  36 and 8. 
A)  8.7 and 1.94. 
B)  36 and 1.94. 
C)  36 and 1.86. 
D)  36 and 8.

Question 4

Which of the following is NOT an example of nonsampling error?

Accepted Answer

A)  Nonresponse error 
B)  Parameter error 
C)  Interviewer error 
D)  Processing error 
A)  Nonresponse error 
B)  Parameter error 
C)  Interviewer error 
D)  Processing error

Question 5

Which of the following is the largest data set size?

Accepted Answer

A)  Yottabyte 
B)  Terabyte 
C)  Zettabyte 
D)  Petabyte 
A)  Yottabyte 
B)  Terabyte 
C)  Zettabyte 
D)  Petabyte

Question 6

When the research objective and the population from which the sample is to be drawn are not aligned is which of the following nonsampling errors?

Accepted Answer

A)  Coverage error 
B)  Nonresponse error 
C)  Measurement error 
D)  Research error 
A)  Coverage error 
B)  Nonresponse error 
C)  Measurement error 
D)  Research error

Question 7

Which of the following attributes or dimensions of big data is described as the speed at which the data are generated?

Accepted Answer

A)  Volume 
B)  Variety 
C)  Veracity 
D)  Velocity 
A)  Volume 
B)  Variety 
C)  Veracity 
D)  Velocity

Question 8

The following information was collected from a simple random sample of a population. 9
13
15
15
21
24
The point estimate of the mean of the population is

Accepted Answer

A)  14.5. 
B)  15. 
C)  6. 
D)  16. 
A)  14.5. 
B)  15. 
C)  6. 
D)  16.

Question 9

A population has a mean of 180 and a standard deviation of 36. A sample of 84 observations will be taken. The probability that the sample mean will be between 181 and 185 is

Accepted Answer

A)  0.2980. 
B)  0.7020. 
C)  0.2989. 
D)  0.7011. 
A)  0.2980. 
B)  0.7020. 
C)  0.2989. 
D)  0.7011.

Question 10

Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. Which of the following best describes the form of the sampling distribution of the sample mean for this situation?

Accepted Answer

A)  Approximately normal because the sample size is small relative to the population size 
B)  Approximately normal because of the central limit theorem 
C)  Exactly normal 
D)  None of these alternatives is correct. 
A)  Approximately normal because the sample size is small relative to the population size 
B)  Approximately normal because of the central limit theorem 
C)  Exactly normal 
D)  None of these alternatives is correct.

Question 11

A subset of a population selected to represent the population is a

Accepted Answer

A)  subset. 
B)  sample. 
C)  small population. 
D)  parameter. 
A)  subset. 
B)  sample. 
C)  small population. 
D)  parameter.

Question 12

The standard error of the proportion will become larger as​

Accepted Answer

A)  ​n increases. 
B)  ​p approaches 0. 
C)  ​p approaches .5. 
D)  ​p approaches 1. 
A)  ​n increases. 
B)  ​p approaches 0. 
C)  ​p approaches .5. 
D)  ​p approaches 1.

Question 13

The number of different simple random samples of size 5 that can be selected from a population of size 10 is

Accepted Answer

A)  50 
B)  30,240 
C)  2 
D)  252 
A)  50 
B)  30,240 
C)  2 
D)  252

Question 14

A population consists of 15 items. The number of different simple random samples of size 3 that can be selected from this population is

Accepted Answer

A)  45. 
B)  455. 
C)  3375. 
D)  2730. 
A)  45. 
B)  455. 
C)  3375. 
D)  2730.

Question 15

A data set that has so many variables that simultaneous consideration of all variables is infeasible is which of the following?

Accepted Answer

A)  Wide data 
B)  Strong data 
C)  Tall data 
D)  Huge data 
A)  Wide data 
B)  Strong data 
C)  Tall data 
D)  Huge data

Question 16

The population being studied is usually considered _____ if it involves an ongoing process that makes listing or counting every element in the population impossible.

Accepted Answer

A)  finite 
B)  infinite 
C)  skewed 
D)  symmetric 
A)  finite 
B)  infinite 
C)  skewed 
D)  symmetric

Question 17

Random samples of size 600 are taken from an infinite population whose population proportion is 0.4. The standard deviation of the sample proportions (i.e., the standard error of the proportion) is

Accepted Answer

A)  0.0004. 
B)  0.2400. 
C)  0.4000. 
D)  0.0200. 
A)  0.0004. 
B)  0.2400. 
C)  0.4000. 
D)  0.0200.

Question 18

A population has a mean of 125 and a standard deviation of 16. A sample of 64 observations will be taken. The probability that the sample mean will be between 122.4 and 126.1 is

Accepted Answer

A)  0.1821. 
B)  0.0919. 
C)  0.6120. 
D)  0.3880. 
A)  0.1821. 
B)  0.0919. 
C)  0.6120. 
D)  0.3880.

Question 19

A simple random sample of size n from a finite population of size N is a sample selected such that each possible sample of size _____ of being selected.

Accepted Answer

A)  N has the same probability 
B)  n has a probability of 0.5 
C)  n has a probability of 0.1 
D)  n has the same probability 
A)  N has the same probability 
B)  n has a probability of 0.5 
C)  n has a probability of 0.1 
D)  n has the same probability

Question 20

A population has a mean of 400 and a standard deviation of 25. A sample of 100 observations will be taken. The probability that the sample mean will be greater than 405 is

Accepted Answer

A)  .9772. 
B)  .0228. 
C)  .4207. 
D)  .3805. 
A)  .9772. 
B)  .0228. 
C)  .4207. 
D)  .3805.

Exam 7: Sampling and Sampling Distributions

The sampling distribution of the sample means

A finite population correction factor is needed in computing the standard deviation of the sampling distribution of sample means

Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. The mean and the standard deviation of the sampling distribution of the sample means are

Which of the following is NOT an example of nonsampling error?

Which of the following is the largest data set size?

When the research objective and the population from which the sample is to be drawn are not aligned is which of the following nonsampling errors?

Which of the following attributes or dimensions of big data is described as the speed at which the data are generated?

The following information was collected from a simple random sample of a population. 9 13 15 15 21 24 The point estimate of the mean of the population is

A population has a mean of 180 and a standard deviation of 36. A sample of 84 observations will be taken. The probability that the sample mean will be between 181 and 185 is

Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. Which of the following best describes the form of the sampling distribution of the sample mean for this situation?

A subset of a population selected to represent the population is a

The standard error of the proportion will become larger as​

The number of different simple random samples of size 5 that can be selected from a population of size 10 is

A population consists of 15 items. The number of different simple random samples of size 3 that can be selected from this population is

A data set that has so many variables that simultaneous consideration of all variables is infeasible is which of the following?

The population being studied is usually considered _____ if it involves an ongoing process that makes listing or counting every element in the population impossible.

Random samples of size 600 are taken from an infinite population whose population proportion is 0.4. The standard deviation of the sample proportions (i.e., the standard error of the proportion) is

A population has a mean of 125 and a standard deviation of 16. A sample of 64 observations will be taken. The probability that the sample mean will be between 122.4 and 126.1 is

A simple random sample of size n from a finite population of size N is a sample selected such that each possible sample of size _____ of being selected.

A population has a mean of 400 and a standard deviation of 25. A sample of 100 observations will be taken. The probability that the sample mean will be greater than 405 is

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The standard error of the proportion will become larger as