Question 1

When a person knowledgeable on the subject of the study selects units that he or she feels are most representative of the population, the approach is called _____ sampling.

Accepted Answer

A)  stratified 
B)  convenience 
C)  judgment 
D)  systematic 
A)  stratified 
B)  convenience 
C)  judgment 
D)  systematic

Question 2

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 3

Convenience sampling is an example of _____ sampling.

Accepted Answer

A)  probabilistic 
B)  judgment 
C)  nonprobabilistic 
D)  cluster 
A)  probabilistic 
B)  judgment 
C)  nonprobabilistic 
D)  cluster

Question 4

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

Question 5

Any method of sampling for which the probability of selecting a sample can not be computed is termed as

Accepted Answer

A)  probability sampling. 
B)  nonprobabilistic sampling. 
C)  unknown population sampling. 
D)  None of these alternatives is correct. 
A)  probability sampling. 
B)  nonprobabilistic sampling. 
C)  unknown population sampling. 
D)  None of these alternatives is correct.

Question 6

With convenience sampling, the units included in the sample are chosen because of​

Accepted Answer

A)  ​objectivity. 
B)  ​accessibility. 
C)  ​impartiality. 
D)  ​variability. 
A)  ​objectivity. 
B)  ​accessibility. 
C)  ​impartiality. 
D)  ​variability.

Question 7

The entity on which data are collected is

Accepted Answer

A)  the sample. 
B)  the element. 
C)  the population. 
D)  cluster. 
A)  the sample. 
B)  the element. 
C)  the population. 
D)  cluster.

Question 8

Cluster sampling tends to provide better results when the elements within the clusters are​

Accepted Answer

A)  ​homogeneous. 
B)  ​heterogeneous. 
C)  ​mutually inclusive. 
D)  ​correlated. 
A)  ​homogeneous. 
B)  ​heterogeneous. 
C)  ​mutually inclusive. 
D)  ​correlated.

Question 9

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)  ease of implementation. 
A)  provides statistically valid statements about the precision of the estimate. 
B)  can provide valid parameter estimates. 
C)  is error free. 
D)  ease of implementation.

Question 10

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 11

For stratified simple random sampling, the factors considered most important in deciding what fraction of the total sample should be assigned to each stratum include all of the following except the _____ each stratum.

Accepted Answer

A)  number of outliers in 
B)  number of elements in 
C)  variance of the elements within 
D)  cost of selecting elements within 
A)  number of outliers in 
B)  number of elements in 
C)  variance of the elements within 
D)  cost of selecting elements within

Question 12

When performing cluster sampling, the primary issue in choosing a sample size is​

Accepted Answer

A)  ​selecting the strata. 
B)  ​minimizing cost. 
C)  ​including all clusters. 
D)  ​selecting the number of clusters. 
A)  ​selecting the strata. 
B)  ​minimizing cost. 
C)  ​including all clusters. 
D)  ​selecting the number of clusters.

Question 13

Simple random sampling has been used to obtain a sample of size 60 from a population of size 500. The sample proportion was 0.7. An approximate 95% confidence interval for the population proportion is

Accepted Answer

A)  0.500 to 0.700 
B)  0.750 to 0.810 
C)  0.588 to 0.812 
D)  0.638 to 0.762 
A)  0.500 to 0.700 
B)  0.750 to 0.810 
C)  0.588 to 0.812 
D)  0.638 to 0.762

Question 14

From a population of size 600, a simple random sample of size 60 is selected. The sample mean is 400, and the sample standard deviation is 50. 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)  388 to 412 
A)  395 to 405 
B)  380 to 420 
C)  360 to 440 
D)  388 to 412

Question 15

With systematic sampling,​

Accepted Answer

A)  ​the first element selected is a random choice. 
B)  ​every nth element is a random choice. 
C)  ​all elements in the sample are random choices. 
D)  ​there are no random choices. 
A)  ​the first element selected is a random choice. 
B)  ​every nth element is a random choice. 
C)  ​all elements in the sample are random choices. 
D)  ​there are no random choices.

Question 16

A list of the sampling units for a study is

Accepted Answer

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

Question 17

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

Accepted Answer

A)  Mail surveys 
B)  Telephone surveys 
C)  Personal interviews 
D)  All of these answers are correct. 
A)  Mail surveys 
B)  Telephone surveys 
C)  Personal interviews 
D)  All of these answers are correct.

Question 18

The error that occurs because a sample, and not the entire population, is used to estimate a population parameter is a _____ error.

Accepted Answer

A)  nonsampling 
B)  sampling 
C)  judgment 
D)  standard 
A)  nonsampling 
B)  sampling 
C)  judgment 
D)  standard

Question 19

A simple random sample of size 64 is taken from a population of size 800. The sample mean is determined to be 2,250 with a standard deviation of 500. The point estimate of the population total is

Accepted Answer

A)  51,200 
B)  1,275,000 
C)  144,000 
D)  1,800,000 
A)  51,200 
B)  1,275,000 
C)  144,000 
D)  1,800,000

Question 20

Stratified random sampling is a method of selecting a sample in which

Accepted Answer

A)  the sample is first divided into strata, and then random samples are taken from each stratum. 
B)  various strata are selected from the sample. 
C)  the population is first divided into strata, and then random samples are drawn from each stratum. 
D)  the population is first divided into various stratums and then random samples are drawn from each strata. 
A)  the sample is first divided into strata, and then random samples are taken from each stratum. 
B)  various strata are selected from the sample. 
C)  the population is first divided into strata, and then random samples are drawn from each stratum. 
D)  the population is first divided into various stratums and then random samples are drawn from each strata.

Exam 22: Sample Survey

When a person knowledgeable on the subject of the study selects units that he or she feels are most representative of the population, the approach is called _____ sampling.

Sampling errors can

Convenience sampling is an example of _____ sampling.

A survey of a subset of a population is called a

Any method of sampling for which the probability of selecting a sample can not be computed is termed as

With convenience sampling, the units included in the sample are chosen because of​

The entity on which data are collected is

Cluster sampling tends to provide better results when the elements within the clusters are​

The advantage of nonprobabilistic sampling is that it is inexpensive and

The population from which the sample is actually selected is

For stratified simple random sampling, the factors considered most important in deciding what fraction of the total sample should be assigned to each stratum include all of the following except the _____ each stratum.

When performing cluster sampling, the primary issue in choosing a sample size is​

Simple random sampling has been used to obtain a sample of size 60 from a population of size 500. The sample proportion was 0.7. An approximate 95% confidence interval for the population proportion is

From a population of size 600, a simple random sample of size 60 is selected. The sample mean is 400, and the sample standard deviation is 50. An approximate 95% confidence interval for the population mean is

With systematic sampling,​

A list of the sampling units for a study is

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

The error that occurs because a sample, and not the entire population, is used to estimate a population parameter is a _____ error.

A simple random sample of size 64 is taken from a population of size 800. The sample mean is determined to be 2,250 with a standard deviation of 500. The point estimate of the population total is

Stratified random sampling is a method of selecting a sample in which

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, Tests 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

Decision Analysis

Index Numbers

Statistical Methods for Quality Control

Filters

With convenience sampling, the units included in the sample are chosen because of

Cluster sampling tends to provide better results when the elements within the clusters are

When performing cluster sampling, the primary issue in choosing a sample size is

With systematic sampling,