Exam 22: Sample Survey

Simple random sampling has been used to obtain a sample of n = 40 elements from a population of N=300.The sample proportion a.Estimate the standard error of the proportion. b.Develop an approximate 95% confidence interval for the population proportion.

Conclusions drawn from a sample survey

Which of the following is(are)the most common type(s)of surveys?

A sample of 5 clusters is to be taken from a population with N = 30 clusters and M = 420 clusters in the population.The values of M_i and a_i are shown below. a.Determine the point estimator of the population proportion. b.Determine an approximate 95% confidence interval estimate for the population proportion.

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

The advantage of nonprobabilistic sampling is that it is inexpensive and

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 total is

Convenience sampling is an example of

Sampling errors can

A sampling unit

A version of cluster sampling in which the elements are formed into clusters on the basis of their geographic proximity is

A random sample of 60 elements was selected from a population of size 400.The sample proportion a.Estimate the standard error of the proportion. b.Develop an approximate 95% confidence interval for the population proportion.

Which of the following sampling methods is a probabilistic sampling method?

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.An approximate 95% confidence interval for the population total is

A university has 5,000 students.The manager of food services at the university is interested in determining the total lunch expenditure.A simple random sample of 121 lunch receipts was selected.The sample showed an average of $3 with a standard deviation of $0.40. a.Estimate the standard error of the sample mean. b.Develop an approximate 95% confidence interval for the population mean. c.Estimate the population's total expenditure for lunch. d.Develop an approximate 95% confidence interval for the total expenditure for lunch.

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 target population is

Errors such as measurement error,processing error,and interviewer error are

An unbiased estimate of the population total is given by the

Exhibit 22-4 Simple random sampling has been used to obtain a sample of size 50 from a population of size 500.The sample proportion was 0.7. -Refer to Exhibit 22-4.An approximate 95% confidence interval for the population proportion is