Question 1

The null hypothesis for a one-sample runs test is __________________.

Accepted Answer

A) "the observations in the sample are randomly generated" 
B) "the observations in the sample are not correlated" 
C) "the observations in the sample are statistically independent" 
D) "the observations in the sample are cross-linked" 
E) "the observations are systematically generated" 
A) "the observations in the sample are randomly generated" 
B) "the observations in the sample are not correlated" 
C) "the observations in the sample are statistically independent" 
D) "the observations in the sample are cross-linked" 
E) "the observations are systematically generated"

Question 2

What is the Spearman rank correlation coefficient for the following set of data?

Accepted Answer

A) -10.2 
B) -2.35 
C) 0.65 
D) 0.50 
E) 0.05 
A) -10.2 
B) -2.35 
C) 0.65 
D) 0.50 
E) 0.05

Question 3

To compare the means of two populations which cannot be assumed to be normally distributed and only ordinal-level data is available from two independent samples,instead of the t-test for independent samples we should use the Mann-Whitney U test.

Accepted Answer

A) True 
 B)False

Question 4

Suppose a research uses the Mann-Whitney test to determine if there is a difference in the volume of text messages sent by a high school student living in a rural area versus an urban area during the month of December.Eight rural high school students and 9 urban high school students were included in the study.If,among all 17,the sum of the ranks W2 produced from the urban high school is 88,the U test statistic is _____________

Accepted Answer

A) 29 
B) 45 
C) 90 
D) 43 
E) 20 
A) 29 
B) 45 
C) 90 
D) 43 
E) 20

Question 5

A Kruskal-Wallis test is to be performed.There will be four categories,and alpha is chosen to be 0.10.The critical chi-square value is _______.

Accepted Answer

A) 6.251 
B) 2.706 
C) 7.779 
D) 4.605 
E) 3.234 
A) 6.251 
B) 2.706 
C) 7.779 
D) 4.605 
E) 3.234

Question 6

Correlation coefficients may be computed for parametric and nonparametric data.If the data are interval data,which of the following should be used?

Accepted Answer

A) Pearson correlation coefficient 
B) Spearman correlation coefficient 
C) Gaussian correlation coefficient 
D) De Moivre correlation coefficient 
E) Gossett correlation coefficient 
A) Pearson correlation coefficient 
B) Spearman correlation coefficient 
C) Gaussian correlation coefficient 
D) De Moivre correlation coefficient 
E) Gossett correlation coefficient

Question 7

A perfect Spearman correlation of +1 or −1 between two variables indicates

Accepted Answer

A) a perfect linear relationship between the two variables 
B) a perfect monotone function of the two variables. 
C) the Pearson correlation is 1 
D) the Pearson correlation is +1 or -1 
E) the two variables are not related. 
A) a perfect linear relationship between the two variables 
B) a perfect monotone function of the two variables. 
C) the Pearson correlation is 1 
D) the Pearson correlation is +1 or -1 
E) the two variables are not related.

Question 8

Performance records for 18 salespersons are selected to investigate whether compensation methods are a significant motivational factor.   
A Kruskal-Wallis test performed with $\alpha$= 0.01 will result in a decision to _____.

Accepted Answer

A) reject the null hypothesis 
B) reject the alternate hypothesis 
C) do not reject the null hypothesis 
D) do no reject the alternate hypothesis 
E) do nothing 
A) reject the null hypothesis 
B) reject the alternate hypothesis 
C) do not reject the null hypothesis 
D) do no reject the alternate hypothesis 
E) do nothing

Question 9

In a Wilcoxon matched-pairs signed rank test with 20 matched-pairs of observations,the observed value of the ?T statistic based on sample data is 76.33.The corresponding observed z-value is ___________.

Accepted Answer

A) −1.79 
B) −2.07 
C) −1.70 
D) −1.59 
E) −1.07 
A) −1.79 
B) −2.07 
C) −1.70 
D) −1.59 
E) −1.07

Question 10

Charles Clayton monitors the daily performance of his investment portfolio by recording a "+" or a "-"sign to indicate whether the portfolio's value increased or decreased from the previous day.His record for the last eighteen business days is "- + + - - - + - - + + + - + + + + -".The number of runs in this sample is _________.

Accepted Answer

A) uncertain 
B) four 
C) five 
D) nine 
E) one 
A) uncertain 
B) four 
C) five 
D) nine 
E) one

Question 11

The sampling distribution of R,the number of runs,in the one-sample runs test for randomness of the observations in a large sample is approximately normal if H0 is true.

Accepted Answer

A) True 
 B)False

Question 12

A disadvantage of nonparametric statistics is that the probability statements obtained from most nonparametric tests are not exact probabilities.

Accepted Answer

A) True 
 B)False

Question 13

The HYPERLINK "http://www.statisticssolutions.com/mann-whitney-u-test" Mann-Whitney U-test is used to test whether three or more independent HYPERLINK "http://www.experiment-resources.com/sample-group.html" samples of observations are drawn from the same or identical distributions.

Accepted Answer

A) True 
 B)False

Question 14

The degree of association of two variables cannot be estimated when only ordinal-level data are available.

Accepted Answer

A) True 
 B)False

Question 15

Many "Before and after" types of experiments should be analyzed using _______.

Accepted Answer

A) chi-square goodness of fit test 
B) Kruskal-Wallis test 
C) Mann-Whitney U test 
D) Wilcoxon test 
E) Friedman test 
A) chi-square goodness of fit test 
B) Kruskal-Wallis test 
C) Mann-Whitney U test 
D) Wilcoxon test 
E) Friedman test

Question 16

The nonparametric counterpart of the t test to compare the means of two related samples is the _______.

Accepted Answer

A) chi-square goodness of fit test 
B) chi-square test of independence 
C) Mann-Whitney U test 
D) Wilcoxon test 
E) Friedman test 
A) chi-square goodness of fit test 
B) chi-square test of independence 
C) Mann-Whitney U test 
D) Wilcoxon test 
E) Friedman test

Question 17

In the Wilcoxon test of the differences between two populations,the value z statistic was calculated to be 1.80.If the level of significance is 0.05,which of the following decisions is appropriate?

Accepted Answer

A) Reject the null hypothesis 
B) Do not reject the null hypothesis 
C) Indeterminate without the sample size 
D) Indeterminate without all of the data 
E) Inconclusive 
A) Reject the null hypothesis 
B) Do not reject the null hypothesis 
C) Indeterminate without the sample size 
D) Indeterminate without all of the data 
E) Inconclusive

Question 18

A Kruskal-Wallis test is to be performed.There will be five categories,and alpha is chosen to be 0.01.The critical chi-square value is _______.

Accepted Answer

A) 15.086 
B) 13.277 
C) 7.779 
D) 9.236 
E) 8.987 
A) 15.086 
B) 13.277 
C) 7.779 
D) 9.236 
E) 8.987

Question 19

An advantage of nonparametric statistics is that the computations on nonparametric statistics are usually less complicated than those for parametric statistics,particularly for small samples.

Accepted Answer

A) True 
 B)False

Question 20

Performance records for 18 salespersons are selected to investigate whether compensation methods are a significant motivational factor.   
A Kruskal-Wallis test is to be performed with $\alpha$ = 0.01.The null hypothesis is _______.

Accepted Answer

A) Group 1 = Group 2 = Group 3 
B) Group 1 $\neq$ Group 2  $\neq$ Group 3 
C) Group 1 $\ge$ Group 2 $\ge$ Group 3 
D) Group 1 $\le$ Group 2 $\le$  Group 3 
E) Group 1 $\le$  Group 2 ≥ Group 3 
A) Group 1 = Group 2 = Group 3 
B) Group 1 $\neq$ Group 2  $\neq$ Group 3 
C) Group 1 $\ge$ Group 2 $\ge$ Group 3 
D) Group 1 $\le$ Group 2 $\le$  Group 3 
E) Group 1 $\le$  Group 2 ≥ Group 3

The null hypothesis for a one-sample runs test is __________________.

What is the Spearman rank correlation coefficient for the following set of data?

To compare the means of two populations which cannot be assumed to be normally distributed and only ordinal-level data is available from two independent samples,instead of the t-test for independent samples we should use the Mann-Whitney U test.

A Kruskal-Wallis test is to be performed.There will be four categories,and alpha is chosen to be 0.10.The critical chi-square value is _______.

Correlation coefficients may be computed for parametric and nonparametric data.If the data are interval data,which of the following should be used?

A perfect Spearman correlation of +1 or −1 between two variables indicates

In a Wilcoxon matched-pairs signed rank test with 20 matched-pairs of observations,the observed value of the ?T statistic based on sample data is 76.33.The corresponding observed z-value is ___________.

The sampling distribution of R,the number of runs,in the one-sample runs test for randomness of the observations in a large sample is approximately normal if H₀ is true.

A disadvantage of nonparametric statistics is that the probability statements obtained from most nonparametric tests are not exact probabilities.

The HYPERLINK "http://www.statisticssolutions.com/mann-whitney-u-test" Mann-Whitney U-test is used to test whether three or more independent HYPERLINK "http://www.experiment-resources.com/sample-group.html" samples of observations are drawn from the same or identical distributions.

The degree of association of two variables cannot be estimated when only ordinal-level data are available.

Many "Before and after" types of experiments should be analyzed using _______.

The nonparametric counterpart of the t test to compare the means of two related samples is the _______.

In the Wilcoxon test of the differences between two populations,the value z statistic was calculated to be 1.80.If the level of significance is 0.05,which of the following decisions is appropriate?

A Kruskal-Wallis test is to be performed.There will be five categories,and alpha is chosen to be 0.01.The critical chi-square value is _______.

An advantage of nonparametric statistics is that the computations on nonparametric statistics are usually less complicated than those for parametric statistics,particularly for small samples.

Introduction to Statistics

Charts and Graphs

Descriptive Statistics

Probability

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Statistical Quality Control

Decision Analysis

Filters

Exam 17: Nonparametric Statistics

The null hypothesis for a one-sample runs test is __________________.

What is the Spearman rank correlation coefficient for the following set of data?

To compare the means of two populations which cannot be assumed to be normally distributed and only ordinal-level data is available from two independent samples,instead of the t-test for independent samples we should use the Mann-Whitney U test.

A Kruskal-Wallis test is to be performed.There will be four categories,and alpha is chosen to be 0.10.The critical chi-square value is _______.

Correlation coefficients may be computed for parametric and nonparametric data.If the data are interval data,which of the following should be used?

A perfect Spearman correlation of +1 or −1 between two variables indicates

Performance records for 18 salespersons are selected to investigate whether compensation methods are a significant motivational factor. A Kruskal-Wallis test performed with α\alphaα = 0.01 will result in a decision to _____.

In a Wilcoxon matched-pairs signed rank test with 20 matched-pairs of observations,the observed value of the ?T statistic based on sample data is 76.33.The corresponding observed z-value is ___________.

The sampling distribution of R,the number of runs,in the one-sample runs test for randomness of the observations in a large sample is approximately normal if H0 is true.

A disadvantage of nonparametric statistics is that the probability statements obtained from most nonparametric tests are not exact probabilities.

The HYPERLINK "http://www.statisticssolutions.com/mann-whitney-u-test" Mann-Whitney U-test is used to test whether three or more independent HYPERLINK "http://www.experiment-resources.com/sample-group.html" samples of observations are drawn from the same or identical distributions.

The degree of association of two variables cannot be estimated when only ordinal-level data are available.

Many "Before and after" types of experiments should be analyzed using _______.

The nonparametric counterpart of the t test to compare the means of two related samples is the _______.

In the Wilcoxon test of the differences between two populations,the value z statistic was calculated to be 1.80.If the level of significance is 0.05,which of the following decisions is appropriate?

A Kruskal-Wallis test is to be performed.There will be five categories,and alpha is chosen to be 0.01.The critical chi-square value is _______.

An advantage of nonparametric statistics is that the computations on nonparametric statistics are usually less complicated than those for parametric statistics,particularly for small samples.

Performance records for 18 salespersons are selected to investigate whether compensation methods are a significant motivational factor. A Kruskal-Wallis test is to be performed with α\alphaα = 0.01.The null hypothesis is _______.

Introduction to Statistics

Charts and Graphs

Descriptive Statistics

Probability

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Statistical Quality Control

Decision Analysis

Filters

The sampling distribution of R,the number of runs,in the one-sample runs test for randomness of the observations in a large sample is approximately normal if H₀ is true.