Exam 22: Sample Survey on Website

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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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The following are the results of a stratified random sample. 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.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.

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A survey of a subset of a population is called a

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

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A list of the sampling units for a study is

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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 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. = 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.

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Cluster sampling is

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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

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

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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

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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.

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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

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An unbiased estimate of the population total is given by the

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The following are the results provided by a stratified simple random sample. 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. 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.

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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

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The advantage of nonprobabilistic sampling is that it is inexpensive and

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Conclusions drawn from a sample survey

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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 stratified simple random sample has been taken with the following results. 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.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.

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Convenience sampling is an example of

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