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Exam 22: Sample Survey on Website

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Question 31

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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.

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a.0.041
b....

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Question 32

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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.

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a.3.7 (rounded)
b.11...

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Question 33

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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.

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.

An unbiased estimate of the population total is given by the

A list of the sampling units for a study is

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.

Cluster sampling is

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

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 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.

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.

A survey of a subset of a population is called a

The advantage of nonprobabilistic sampling is that it is inexpensive and

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

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

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

Conclusions drawn from a sample survey