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Exam 22: Sample Survey on Website

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Question 31

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Conclusions drawn from a sample survey

A) apply only to the sample
B) apply to any population
C) apply only to the sampled population
D) None of these alternatives is correct.

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Question 32

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Cluster sampling is

A) a nonprobability sampling method
B) the same as convenience sampling
C) a probability sampling method
D) None of these alternatives is correct.

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Question 33

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A company has 600 employees. A random sample of 49 employees took a computer literacy test. The sample resulted in a mean score of 75 with a standard deviation of 21. a.Estimate the standard error of the mean. b.Develop an approximate 95% confidence interval for the population mean of the 600 employees.

Exhibit 22-2 A simple random sample of 43 elements has been selected from a population of size 800. The sample mean is 500, and the sample standard deviation is 60. -Refer to Exhibit 22-2. The standard error of the mean is

A number added to and subtracted from a point estimate to create an approximate 95% confidence interval is known as

Simple random sampling has been used to obtain a sample of 81 elements from a population of size 500. The sample mean is 120, and the sample standard deviation is determined to be 36. a.Estimate the standard error of the mean. b.Develop an approximate 95% confidence interval for the population mean. c.Estimate the population total. d.Develop an approximate 95% confidence interval for the population total.

A method of selecting a sample by randomly selecting the first element and then selecting every K^th element thereafter is

The advantage of nonprobabilistic sampling is that it is inexpensive and

The following are the results of a stratified random sample. a.Determine the point estimator of the population proportion. b.Estimate the standard error of the population proportion. c.Develop an approximate 95% confidence interval for the population proportion.

A stratified simple random sample has been taken with the following results. a.Determine the point estimator of the population proportion. b.Estimate the standard error of the population proportion. c.Develop an approximate 95% confidence interval for the population proportion.

Exhibit 22-1 A simple random sample of size 64 is taken from a population of size 800. The sample mean is determined to be 2,550 with a standard deviation of 500. -Refer to Exhibit 22-1. An estimate of the standard error of the mean (for the total) is

An unbiased estimate of the population total is given by the

Exhibit 22-3 From a population of size 600, a simple random sample of size 58 is selected. The sample mean is 400, and the sample standard deviation is 40. -Refer to Exhibit 22-3. An estimate of the standard error of the mean is

A list of the sampling units for a study is

From a population of 2000 accounts receivable, a simple random sample of 120 accounts is selected. Thirty-six of the accounts in the sample were overdue. a.Estimate the standard error of the proportion of the overdue accounts. b.Develop an approximate 95% confidence interval for the proportion of overdue accounts in the population.

The following are the results provided by a stratified simple random sample. a.Determine a point estimate for the mean of the population. b.Estimate the standard error of the mean. c.Approximate a 95% confidence interval for the population mean. d.Compute the population total. e.Determine a 95% confidence interval for the population total.

Assume simple random sampling has been used, and the following information was obtained.Population size N = 900 Sample size n = 36 Sample mean = 300 Sample standard deviation s = 72 a.Estimate the standard error of the mean. b.Develop an approximate 95% confidence interval for the population mean.

Exhibit 22-3 From a population of size 600, a simple random sample of size 58 is selected. The sample mean is 400, and the sample standard deviation is 40. -Refer to Exhibit 22-3. An approximate 95% confidence interval for the population mean is

Convenience sampling is an example of

A survey of a subset of a population is called a