Question 1

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)   252E) A) and D)
F) None of the above

Question 2

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)   symmetricE) A) and B)
F) A) and D)

Question 3

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.E) All of the above
F) B) and C)

Question 4

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 probabilityE) None of the above
F) B) and D)

Question 5

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)   VelocityE) A) and B)
F) A) and C)

Question 6

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.E) A) and C)
F) C) and D)

Question 7

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.E) All of the above
F) A) and B)

Question 8

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.E) All of the above
F) A) and B)

Question 9

Which of the following is the largest data set size?

Accepted Answer

A)   Yottabyte
B)   Terabyte
C)   Zettabyte
D)   PetabyteE) B) and C)
F) A) and B)

Question 10

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

Accepted Answer

A)   subset.
B)   sample.
C)   small population.
D)   parameter.E) C) and D)
F) B) and D)

Question 11

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.E) C) and D)
F) All of the above

Question 12

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.E) B) and D)
F) C) and D)

Question 13

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.E) C) and D)
F) A) and C)

Question 14

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 dataE) All of the above
F) C) and D)

Question 15

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.E) C) and D)
F) B) and D)

Question 16

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 errorE) A) and B)
F) A) and C)

Question 17

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.E) C) and D)
F) A) and B)

Question 18

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.E) A) and B)
F) A) and C)

Question 19

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.E) All of the above
F) B) and D)

Question 20

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

Accepted Answer

A)   Nonresponse error
B)   Parameter error
C)   Interviewer error
D)   Processing errorE) All of the above
F) C) and D)

Exam 7: Sampling and Sampling Distributions

The sampling distribution of the sample means

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

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Which of the following is the largest data set size?

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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

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

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

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

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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

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

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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

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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?

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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 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

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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.

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The standard error of the proportion will become larger as​

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

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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?

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

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

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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

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The standard error of the proportion will become larger as

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