Question 1

Which of the following is an example of nonprobabilistic sampling?

Accepted Answer

A)  Simple random sampling 
B)  Stratified simple random sampling 
C)  Cluster sampling 
D)  Judgment sampling 
A)  Simple random sampling 
B)  Stratified simple random sampling 
C)  Cluster sampling 
D)  Judgment sampling D

Question 2

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. 
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. B

Question 3

Probabilistic sampling is any method of sampling in which

Accepted Answer

A)  the probability of the occurrence of various events in the study are known. 
B)  there are only two possible outcomes, such as P(
A)  and P(Ac). 
C)  the probability of each possible sample can be computed. 
D)  the probability of each possible sample is one. 
A)  the probability of the occurrence of various events in the study are known. 
B)  there are only two possible outcomes, such as P(
A)  and P(Ac). 
C)  the probability of each possible sample can be computed. 
D)  the probability of each possible sample is one. C

Question 4

A simple random sample of size 81 is taken from a population of size 800. The sample mean is determined to be 2,550 with a standard deviation of 500. An estimate of the standard error of the mean (for the total) is

Accepted Answer

A)  62,500.50 
B)  42124.41 
C)  52.67 
D)  50,000.00 
A)  62,500.50 
B)  42124.41 
C)  52.67 
D)  50,000.00

Question 5

In a sample survey, it is common practice to use a t value of (when approximating a 95% confidence interval)

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
A)  1. 
B)  2. 
C)  3. 
D)  4.

Question 6

Conclusions drawn from a sample survey apply

Accepted Answer

A)  only to the sample. 
B)  to any population. 
C)  only to the sampled population. 
D)  to the target population. 
A)  only to the sample. 
B)  to any population. 
C)  only to the sampled population. 
D)  to the target population.

Question 7

A simple random sample of 43 elements has been selected from a population of size 800. The sample mean is 600, and the sample standard deviation is 60. The population total is

Accepted Answer

A)  36,000 
B)  25,800 
C)  480,000 
D)  500,000 
A)  36,000 
B)  25,800 
C)  480,000 
D)  500,000

Question 8

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 total is

Accepted Answer

A)  350,000 to 450,000 
B)  232,800 to 247,200 
C)  350 to 400 
D)  388 to 412 
A)  350,000 to 450,000 
B)  232,800 to 247,200 
C)  350 to 400 
D)  388 to 412

Question 9

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

Accepted Answer

A)  stratified simple random 
B)  random 
C)  judgment 
D)  area 
A)  stratified simple random 
B)  random 
C)  judgment 
D)  area

Question 10

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

Accepted Answer

A)  Judgment sampling 
B)  Convenience sampling 
C)  Cluster sampling 
D)  Random sampling 
A)  Judgment sampling 
B)  Convenience sampling 
C)  Cluster sampling 
D)  Random sampling

Question 11

Cluster sampling is

Accepted Answer

A)  a nonprobability sampling method. 
B)  convenience based sampling. 
C)  a probability sampling method. 
D)  judgement based sampling. 
A)  a nonprobability sampling method. 
B)  convenience based sampling. 
C)  a probability sampling method. 
D)  judgement based sampling.

Question 12

The units that are selected for sampling constitute the

Accepted Answer

A)  sample. 
B)  population. 
C)  frame. 
D)  sampling units. 
A)  sample. 
B)  population. 
C)  frame. 
D)  sampling units.

Question 13

A simple random sample of 45 elements has been selected from a population of size 800. The sample mean is 600, and the sample standard deviation is 60. An approximate 95% confidence interval for the population total is

Accepted Answer

A)  583 to 617 
B)  466,400 to 493,600 
C)  400,000 to 500,000 
D)  350,000 to 450,000 
A)  583 to 617 
B)  466,400 to 493,600 
C)  400,000 to 500,000 
D)  350,000 to 450,000

Question 14

A target population is

Accepted Answer

A)  the population from which the sample is actually selected. 
B)  the population for which inferences are to be made. 
C)  always the same as the sampled population. 
D)  the same as the sample. 
A)  the population from which the sample is actually selected. 
B)  the population for which inferences are to be made. 
C)  always the same as the sampled population. 
D)  the same as the sample.

Question 15

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 estimate of the standard error of the mean is

Accepted Answer

A)  4.1 
B)  5.1 
C)  6.1 
D)  7.1 
A)  4.1 
B)  5.1 
C)  6.1 
D)  7.1

Question 16

A survey of an entire population is called

Accepted Answer

A)  population analysis. 
B)  population survey. 
C)  census. 
D)  target population survey. 
A)  population analysis. 
B)  population survey. 
C)  census. 
D)  target population survey.

Question 17

With nonprobabilistic sampling

Accepted Answer

A)  it is possible to make estimates about the precision of the population parameters. 
B)  it is not possible to make statements about the precision of estimates made concerning the population parameters. 
C)  estimates can be made with precision if the sample is larger than 30. 
D)  none of these alternatives is correct. 
A)  it is possible to make estimates about the precision of the population parameters. 
B)  it is not possible to make statements about the precision of estimates made concerning the population parameters. 
C)  estimates can be made with precision if the sample is larger than 30. 
D)  none of these alternatives is correct.

Question 18

A simple random sample of 45 elements has been selected from a population of size 800. The sample mean is 500, and the sample standard deviation is 60. The standard error of the mean is

Accepted Answer

A)  8.9 
B)  62.7 
C)  1.6 
D)  8.7 
A)  8.9 
B)  62.7 
C)  1.6 
D)  8.7

Question 19

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. The estimate of the standard error of proportion is

Accepted Answer

A)  0.210 
B)  0.068 
C)  0.300 
D)  0.056 
A)  0.210 
B)  0.068 
C)  0.300 
D)  0.056

Question 20

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

Accepted Answer

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

Exam 22: Sample Survey

Which of the following is an example of nonprobabilistic sampling?

An unbiased estimate of the population total is given by the

Probabilistic sampling is any method of sampling in which

A simple random sample of size 81 is taken from a population of size 800. The sample mean is determined to be 2,550 with a standard deviation of 500. An estimate of the standard error of the mean (for the total) is

In a sample survey, it is common practice to use a t value of (when approximating a 95% confidence interval)

Conclusions drawn from a sample survey apply

A simple random sample of 43 elements has been selected from a population of size 800. The sample mean is 600, and the sample standard deviation is 60. The population total 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 total is

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

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

Cluster sampling is

The units that are selected for sampling constitute the

A simple random sample of 45 elements has been selected from a population of size 800. The sample mean is 600, and the sample standard deviation is 60. An approximate 95% confidence interval for the population total is

A target population 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 estimate of the standard error of the mean is

A survey of an entire population is called

With nonprobabilistic sampling

A simple random sample of 45 elements has been selected from a population of size 800. The sample mean is 500, and the sample standard deviation is 60. The standard error of the mean 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. The estimate of the standard error of proportion is

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

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

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