Question 1

The Wilcoxon signed-ranks T test is used as a nonparametric alternative to which parametric test?

Accepted Answer

A)  one-sample t test 
B)  two-independent-sample t test 
C)  related-samples t test 
D)  one-sample t test and related-samples t test 
A)  one-sample t test 
B)  two-independent-sample t test 
C)  related-samples t test 
D)  one-sample t test and related-samples t test C

Question 2

A researcher computes the Wilcoxon signed-ranks T test.She computes T = 68 using a sample of 24 participants.What is the decision for a two-tailed test at a .05 level of significance?

Accepted Answer

A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  there is not enough information to answer this question 
A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  there is not enough information to answer this question B

Question 3

The sign test is used as a nonparametric alternative to which parametric test?

Accepted Answer

A)  one-sample t test 
B)  two-independent-sample t test 
C)  related-samples t test 
D)  one-sample t test and related-samples t test 
A)  one-sample t test 
B)  two-independent-sample t test 
C)  related-samples t test 
D)  one-sample t test and related-samples t test D

Question 4

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic for the Friedman test is approximately distributed as a ______.

Accepted Answer

A)  t distribution 
B)  F distribution 
C)  normal distribution 
D)  chi-square distribution 
A)  t distribution 
B)  F distribution 
C)  normal distribution 
D)  chi-square distribution

Question 5

Nonparametric tests are associated with less power to detect an effect when the data are skewed in the population.

Accepted Answer

A) True 
 B)False

Question 6

A researcher finds that the number of positive ranks is 13 and the number of negative ranks is 4 using a sample of 17 participants.Based on these data,what is the decision for a related-samples sign test at a .05 level of significance?

Accepted Answer

A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  there is not enough information to answer this question 
A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  there is not enough information to answer this question

Question 7

Which of the following best explains how to find the test statistic for the one-sample sign test?

Accepted Answer

A)  Scores above the median are assigned a plus sign (+); scores below the median are assigned a negative sign (-); the test statistic is the number of pluses or minuses, whichever occurs most often. 
B)  Scores are correlated as either positive (+) or negative (-); the test statistic is the extent to which scores are positively or negatively correlated. 
C)  Scores are coded as being consistent (+) or inconsistent (-) with the null hypothesis; the test statistic is the number of pluses or minuses, whichever occurs most often. 
D)  The variability of scores is compared with the variance stated by the null hypothesis; larger variability is considered a sign that the data are significant. 
A)  Scores above the median are assigned a plus sign (+); scores below the median are assigned a negative sign (-); the test statistic is the number of pluses or minuses, whichever occurs most often. 
B)  Scores are correlated as either positive (+) or negative (-); the test statistic is the extent to which scores are positively or negatively correlated. 
C)  Scores are coded as being consistent (+) or inconsistent (-) with the null hypothesis; the test statistic is the number of pluses or minuses, whichever occurs most often. 
D)  The variability of scores is compared with the variance stated by the null hypothesis; larger variability is considered a sign that the data are significant.

Question 8

The null hypothesis for the Friedman test is that the sum of ranks in each group does not differ between groups.

Accepted Answer

A) True 
 B)False

Question 9

When the test statistic for the Mann-Whitney U test is equal to or smaller than the critical value,we reject the null hypothesis.

Accepted Answer

A) True 
 B)False

Question 10

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic H is approximately distributed as a chi-square distribution.

Accepted Answer

A) True 
 B)False

Question 11

Tests for ordinal data are regarded as nonparametric tests.

Accepted Answer

A) True 
 B)False

Question 12

The Mann-Whitney U is a statistical procedure used to determine whether the dispersion of ranks in two or more independent groups is equal.

Accepted Answer

A) True 
 B)False

Question 13

For the Friedman test,when is less than the critical value,we decide to ______.

Accepted Answer

A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  not enough information 
A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  not enough information

Question 14

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic for the Friedman test is associated with ______ degrees of freedom.

Accepted Answer

A)  no 
B)  n - 1 
C)  k - 1 
D)  .05 
A)  no 
B)  n - 1 
C)  k - 1 
D)  .05

Question 15

For a two-sample sign test,count the number of positive and negative difference scores.The larger number is the test statistic.

Accepted Answer

A) True 
 B)False

Question 16

What is the null hypothesis for a Mann-Whitney U test?

Accepted Answer

A)  The number of scores above and below the median are equal. 
B)  The ranks in two groups are equally dispersed. 
C)  The mean differences between two groups are equal. 
D)  The ranks in two groups are equal to 0. 
A)  The number of scores above and below the median are equal. 
B)  The ranks in two groups are equally dispersed. 
C)  The mean differences between two groups are equal. 
D)  The ranks in two groups are equal to 0.

Question 17

A researcher computes Wilcoxon T = 12 and finds that this value is larger than the critical value.The decision is to reject the null hypothesis.

Accepted Answer

A) True 
 B)False

Question 18

When the test statistic for the Kruskal-Wallis H test is equal to or smaller than the critical value,we reject the null hypothesis.

Accepted Answer

A) True 
 B)False

Question 19

The null hypothesis for the Kruskal-Wallis H test is that scores above and below the median are equal.

Accepted Answer

A) True 
 B)False

Question 20

A professor ranks the grades of students in each of three sections of a statistics course.He computes H = 6.83 for the Kruskal-Wallis H test to test for differences between the sections.What is the decision for this test?

Accepted Answer

A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  there is not enough information to answer this question 
A)  retain the null hypothesis 
B)  reject the null hypothesis 
C)  there is not enough information to answer this question

The Wilcoxon signed-ranks T test is used as a nonparametric alternative to which parametric test?

A researcher computes the Wilcoxon signed-ranks T test.She computes T = 68 using a sample of 24 participants.What is the decision for a two-tailed test at a .05 level of significance?

The sign test is used as a nonparametric alternative to which parametric test?

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic for the Friedman test is approximately distributed as a ______.

Nonparametric tests are associated with less power to detect an effect when the data are skewed in the population.

A researcher finds that the number of positive ranks is 13 and the number of negative ranks is 4 using a sample of 17 participants.Based on these data,what is the decision for a related-samples sign test at a .05 level of significance?

Which of the following best explains how to find the test statistic for the one-sample sign test?

The null hypothesis for the Friedman test is that the sum of ranks in each group does not differ between groups.

When the test statistic for the Mann-Whitney U test is equal to or smaller than the critical value,we reject the null hypothesis.

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic H is approximately distributed as a chi-square distribution.

Tests for ordinal data are regarded as nonparametric tests.

The Mann-Whitney U is a statistical procedure used to determine whether the dispersion of ranks in two or more independent groups is equal.

For the Friedman test,when is less than the critical value,we decide to ______.

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic for the Friedman test is associated with ______ degrees of freedom.

For a two-sample sign test,count the number of positive and negative difference scores.The larger number is the test statistic.

What is the null hypothesis for a Mann-Whitney U test?

A researcher computes Wilcoxon T = 12 and finds that this value is larger than the critical value.The decision is to reject the null hypothesis.

When the test statistic for the Kruskal-Wallis H test is equal to or smaller than the critical value,we reject the null hypothesis.

The null hypothesis for the Kruskal-Wallis H test is that scores above and below the median are equal.

A professor ranks the grades of students in each of three sections of a statistics course.He computes H = 6.83 for the Kruskal-Wallis H test to test for differences between the sections.What is the decision for this test?

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance,effect Size,and Power

Testing Means: One-Sample and Two-Independent-Sample T Tests

Testing Means: Truehe Related-Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Filters

Exam 18: Nonparametric Tests: Tests for Ordinal Data

The Wilcoxon signed-ranks T test is used as a nonparametric alternative to which parametric test?

A researcher computes the Wilcoxon signed-ranks T test.She computes T = 68 using a sample of 24 participants.What is the decision for a two-tailed test at a .05 level of significance?

The sign test is used as a nonparametric alternative to which parametric test?

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic for the Friedman test is approximately distributed as a ______.

Nonparametric tests are associated with less power to detect an effect when the data are skewed in the population.

A researcher finds that the number of positive ranks is 13 and the number of negative ranks is 4 using a sample of 17 participants.Based on these data,what is the decision for a related-samples sign test at a .05 level of significance?

Which of the following best explains how to find the test statistic for the one-sample sign test?

The null hypothesis for the Friedman test is that the sum of ranks in each group does not differ between groups.

When the test statistic for the Mann-Whitney U test is equal to or smaller than the critical value,we reject the null hypothesis.

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic H is approximately distributed as a chi-square distribution.

Tests for ordinal data are regarded as nonparametric tests.

The Mann-Whitney U is a statistical procedure used to determine whether the dispersion of ranks in two or more independent groups is equal.

For the Friedman test,when is less than the critical value,we decide to ______.

When the null hypothesis is true and n is greater than or equal to 5 per group,the test statistic for the Friedman test is associated with ______ degrees of freedom.

For a two-sample sign test,count the number of positive and negative difference scores.The larger number is the test statistic.

What is the null hypothesis for a Mann-Whitney U test?

A researcher computes Wilcoxon T = 12 and finds that this value is larger than the critical value.The decision is to reject the null hypothesis.

When the test statistic for the Kruskal-Wallis H test is equal to or smaller than the critical value,we reject the null hypothesis.

The null hypothesis for the Kruskal-Wallis H test is that scores above and below the median are equal.

A professor ranks the grades of students in each of three sections of a statistics course.He computes H = 6.83 for the Kruskal-Wallis H test to test for differences between the sections.What is the decision for this test?

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance,effect Size,and Power

Testing Means: One-Sample and Two-Independent-Sample T Tests

Testing Means: Truehe Related-Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Filters