Question 1

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

Accepted Answer

A) only mail surveys 
B) only telephone surveys 
C) only personal interviews 
D) All of these answers are correct. 
A) only mail surveys 
B) only telephone surveys 
C) only personal interviews 
D) All of these answers are correct. D

Question 2

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. The estimate of the standard error of proportion is

Accepted Answer

A) 0.210 
B) 0.700 
C) 0.300 
D) 0.062 
A) 0.210 
B) 0.700 
C) 0.300 
D) 0.062 D

Question 3

A sample of 4 clusters is to be taken from a population with N = 40 clusters and M = 600 clusters in the population. The values of Mi and ai are given below.   
a.Determine the point estimator of the population proportion.
b.Determine an approximate 95% confidence interval estimate for the population proportion.

Accepted Answer

a.0.22
b.0.0834 to 0.3566

Question 4

Sampling errors can

Accepted Answer

A) be avoided by increasing the sample size to at least 30 
B) be avoided if the sample is increased so that it will be at least 5% of the population 
C) be avoided by using probabilistic sampling 
D) not be avoided 
A) be avoided by increasing the sample size to at least 30 
B) be avoided if the sample is increased so that it will be at least 5% of the population 
C) be avoided by using probabilistic sampling 
D) not be avoided

Question 5

The units that are selected for sampling constitute the

Accepted Answer

A) sample 
B) population 
C) frame 
D) sampling unit 
A) sample 
B) population 
C) frame 
D) sampling unit

Question 6

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 Mi and ai are shown below.   
a.Determine the point estimator of the population proportion.
b.Determine an approximate 95% confidence interval estimate for the population proportion.

Accepted Answer

a.0.20
b.0

Question 7

Nancy Joon, Inc. has 1500 employees. A simple random sample of 81 employees was selected, and the individuals in the sample were asked how much they contribute (monthly) to their retirement accounts. The sample mean,   , was $150 with a standard deviation, s, of $45. 
a.Estimate the standard error of the mean.
b.Develop an approximate 95% confidence interval for the population mean.

Accepted Answer

a.4.86 (ro

Question 8

A sampling unit

Accepted Answer

A) must have one element 
B) may include several elements 
C) can not include more than one element 
D) None of these alternatives is correct. 
A) must have one element 
B) may include several elements 
C) can not include more than one element 
D) None of these alternatives is correct.

Question 9

A sample of 5 clusters is to be taken from a population with N = 30 clusters and M = 300 elements in the population. The values of Mi and Xi for each cluster are shown below.   
a.Determine the point estimate of the population mean.
b.Determine the standard error of the mean.
c.Develop a 95% confidence interval for the population mean.
d.Determine the point estimator of the population total.
e.Approximate a 95% confidence interval estimate of the population total.

Accepted Answer

a.17
b.5.3

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 population total is

Accepted Answer

A) 34,400 
B) 21,500 
C) 400,000 
D) 500,000 
A) 34,400 
B) 21,500 
C) 400,000 
D) 500,000

Question 11

The population from which the sample is actually selected is

Accepted Answer

A) always the target population 
B) the census 
C) the selected sample 
D) the sampled population 
A) always the target population 
B) the census 
C) the selected sample 
D) the sampled population

Question 12

From a population consisting of 8,000 elements, a sample of size 121 is selected. The sample has a mean of 4,000 and a standard deviation of 600.
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

a.54.1
b.3,891.7 to

Question 13

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 mean is

Accepted Answer

A) 482.2 to 517.8 
B) 440.0 to 560.0 
C) 500.0 to 560.0 
D) 440.0 to 500.0 
A) 482.2 to 517.8 
B) 440.0 to 560.0 
C) 500.0 to 560.0 
D) 440.0 to 500.0

Question 14

A sample selected in such a manner that each sample of size n has the same probability of being selected is

Accepted Answer

A) a convenience sample 
B) a judgment sample 
C) nonprobabilistic sampling 
D) a simple random sample 
A) a convenience sample 
B) a judgment sample 
C) nonprobabilistic sampling 
D) a simple random sample

Question 15

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.

Accepted Answer

a.0.052
b.

Question 16

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. The population total is

Accepted Answer

A) 3,944 
B) 16,000 
C) 240,000 
D) 24,000 
A) 3,944 
B) 16,000 
C) 240,000 
D) 24,000

Question 17

We are interested in selecting a sample from a population of size 4,000 in order to develop an approximate 95% confidence interval estimate of the population mean. A pilot study has resulted in a standard deviation of 600. What should be the sample size if we do not want the sampling error to exceed 200?

Accepted Answer

The answer of We are interested in selecting a sample...

Question 18

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.

Accepted Answer

a.24.04
b.0.133
c.23

Question 19

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

Accepted Answer

A) judgment sampling 
B) convenience sampling 
C) cluster sampling 
D) None of these alternatives is correct. 
A) judgment sampling 
B) convenience sampling 
C) cluster sampling 
D) None of these alternatives is correct.

Question 20

The accounting firm of Nancy Ahmadi & Associates (NAA) was commissioned to audit a population of 500 accounts. For this audit, NAA selected a simple random sample of 64 accounts. The sample showed an average discrepancy of $120 with a standard deviation of $24.
a.Estimate the population total discrepancy.
b.Develop an approximate 95% confidence interval for the population total discrepancy.

Accepted Answer

a.$60,000

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

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. The estimate of the standard error of proportion is

Sampling errors can

The units that are selected for sampling constitute the

A sampling unit

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 population total is

The population from which the sample is actually selected 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. An approximate 95% confidence interval for the population mean is

A sample selected in such a manner that each sample of size n has the same probability of being selected 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.

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. The population total is

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

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Index Numbers

Decision Analysis on Website

Filters

Exam 22: Sample Survey on Website

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

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. The estimate of the standard error of proportion is

Sampling errors can

The units that are selected for sampling constitute the

A sampling unit

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 population total is

The population from which the sample is actually selected 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. An approximate 95% confidence interval for the population mean is

A sample selected in such a manner that each sample of size n has the same probability of being selected 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.

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. The population total is

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

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Index Numbers

Decision Analysis on Website

Filters