Question 1

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.

Accepted Answer

The answer of Simple random sampling has been used to...

Question 2

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.

Accepted Answer

The answer of The following are the results of a...

Question 3

A survey of a subset of a population is called a

Accepted Answer

A) sample survey 
B) target survey 
C) sampled population 
D) survey of element

Question 4

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

Accepted Answer

A) cluster of points 
B) bound on sampling error 
C) area point estimation 
D) systematic sampling error

Question 5

A list of the sampling units for a study is

Accepted Answer

A) the sampled population 
B) called the frame 
C) the same as the sample 
D) the sample space

Question 6

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.

Accepted Answer

The answer of Assume simple random sampling has been used,...

Question 7

Cluster sampling is

Accepted Answer

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

Question 8

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

Accepted Answer

A) 62,500.50 
B) 47,958.32 
C) 7.8125 
D) 50,000.00

Question 9

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

Accepted Answer

A) area sampling 
B) stratified sampling 
C) systematic sampling 
D) stratified simple random sampling

Question 10

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

Accepted Answer

A) 9.2 
B) 43.0 
C) 1.6 
D) 8.9

Question 11

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.

Accepted Answer

The answer of A company has 600 employees. A random...

Question 12

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

Accepted Answer

A) 395 to 405 
B) 380 to 420 
C) 360 to 440 
D) 390 to 410

Question 13

An unbiased estimate of the population total is given by the

Accepted Answer

A) sample mean multiplied by the size of the sample 
B) sample mean multiplied by the size of the population 
C) sample size multiplied by the standard error 
D) standard deviation divided by the square root of the sample size

Question 14

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.

Accepted Answer

The answer of The following are the results provided by...

Question 15

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

Accepted Answer

A) 4.0 
B) 5.0 
C) 6.0 
D) 7.0

Question 16

The advantage of nonprobabilistic sampling is that it is inexpensive and

Accepted Answer

A) provides statistically valid statements about the precision of the estimate 
B) can provide valid parameter estimates 
C) is error free 
D) None of these alternatives is correct.

Question 17

Conclusions drawn from a sample survey

Accepted Answer

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.

Question 18

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.

Accepted Answer

The answer of From a population of 2000 accounts receivable,...

Question 19

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.

Accepted Answer

The answer of A stratified simple random sample has been...

Question 20

Convenience sampling is an example of

Accepted Answer

A) probabilistic sampling 
B) sampling where the probabilities are known 
C) nonprobabilistic sampling 
D) None of these alternatives is correct.

Exam 22: Sample Survey on Website

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 survey of a subset of a population is called a

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

A list of the sampling units for a study is

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.

Cluster sampling is

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

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

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

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

The advantage of nonprobabilistic sampling is that it is inexpensive and

Conclusions drawn from a sample survey

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.

Convenience sampling is an example of