Question 1

For a two-tailed Wilcoxon matched-pairs signed-ranks T test with N = 28, what is the critical value?

Accepted Answer

A)  116 or higher 
B)  116 or lower 
C)  130 or higher 
D)  130 or lower 
A)  116 or higher 
B)  116 or lower 
C)  130 or higher 
D)  130 or lower B

Question 2

A researcher is interested in comparing the self-esteem of students who volunteer for community service versus those who do not. The researcher assumes that those who complete community service will have higher self-esteem scores. Self-esteem scores tend to be skewed (not normally distributed). The self-esteem scores are given below. Higher scores indicate higher self-esteem levels.
  
-Should H0 be rejected? What should the researcher conclude?

Accepted Answer

Yes, H₀ should be rejected. Those who do not complete community service have significantly lower self-esteem scores.

Question 3

Imagine you conduct a one-tailed Wilcoxon rank-sum test with the following results: Ws (n1 = 8 and n2 = 8) = 55. What should you conclude?

Accepted Answer

A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant. 
A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant. D

Question 4

For a one-tailed Wilcoxon matched-pairs signed-ranks T test with N = 20, what is the critical value?

Accepted Answer

A)  52 or higher 
B)  52 or lower 
C)  60 or higher 
D)  60 or lower 
A)  52 or higher 
B)  52 or lower 
C)  60 or higher 
D)  60 or lower

Question 5

Imagine you conduct a two-tailed Wilcoxon matched-pairs signed-ranks T test with the following result: T (N = 18) = 38. What should you conclude?

Accepted Answer

A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant. 
A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant.

Question 6

A researcher is interested in comparing the self-esteem of students who volunteer for community service versus those who do not. The researcher assumes that those who complete community service will have higher self-esteem scores. Self-esteem scores tend to be skewed (not normally distributed). The self-esteem scores are given below. Higher scores indicate higher self-esteem levels.
  
-Conduct the appropriate analysis.

Accepted Answer

W_s (n₁ = 6,

Question 7

Both the _____ test and the _____ test are used with ordinal data to compare two groups.

Accepted Answer

A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Wilcoxon matched-pairs signed-ranks T 
A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Wilcoxon matched-pairs signed-ranks T

Question 8

Imagine you conduct a one-tailed Wilcoxon matched-pairs signed-ranks T test with the following result: T (N = 12) = 18. What should you conclude?

Accepted Answer

A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant. 
A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant.

Question 9

How are the degrees of freedom for the Wilcoxon rank-sum test determined?

Accepted Answer

A)  N - 1 
B)  N(n - 1) 
C)  N - k 
D)  There are no degrees of freedom for the Wilcoxon rank-sum test. 
A)  N - 1 
B)  N(n - 1) 
C)  N - k 
D)  There are no degrees of freedom for the Wilcoxon rank-sum test.

Question 10

Imagine I conducted the following experiment: I used gender as a nonmanipulated independent variable and measured performance in my class. I measured performance by ranking everyone in the class, giving the person with the highest grade a 1, the person with the 2nd highest grade a 2, etc. Which statistic would I use to determine any differences in performance between these two groups?

Accepted Answer

As the data are ordinal (ranked), you wo

Question 11

Both the _____ test and the _____ test are used with between-subjects designs.

Accepted Answer

A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Friedman 
A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Friedman

Question 12

Both the _____ test and the _____ test are used with within-subjects designs.

Accepted Answer

A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Friedman 
A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Friedman

Question 13

A researcher is interested in comparing the self-esteem of students who volunteer for community service versus those who do not. The researcher assumes that those who complete community service will have higher self-esteem scores. Self-esteem scores tend to be skewed (not normally distributed). The self-esteem scores are given below. Higher scores indicate higher self-esteem levels.
  
-What statistical test should be used to analyze these data?

Accepted Answer

The Wilcox

Question 14

Imagine you conduct a Wilcoxon rank-sum test with the following results: Ws (n1 = 5 and n2 = 5) = 18. What should you conclude?

Accepted Answer

A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant. 
A)  p < .05 
B)  p < .01 
C)  p < .005 
D)  The result is not significant.

Question 15

A researcher is interested in comparing the self-esteem of students who volunteer for community service versus those who do not. The researcher assumes that those who complete community service will have higher self-esteem scores. Self-esteem scores tend to be skewed (not normally distributed). The self-esteem scores are given below. Higher scores indicate higher self-esteem levels.
  
-Identify H0 and Ha for this study.

Accepted Answer

H0: Md₁ ≤ M

Question 16

Explain when it would be appropriate to use the Friedman test and the Kruskal-Wallis test.

Accepted Answer

The Friedman test is used when you have

Question 17

Both the _____ test and the _____ test are used with ordinal data to compare more than two groups.

Accepted Answer

A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Wilcoxon matched-pairs signed-ranks T 
A)  Friedman; Kruskal-Wallis 
B)  Friedman; Wilcoxon matched-pairs signed-ranks T 
C)  Kruskal-Wallis; Wilcoxon rank-sum 
D)  Wilcoxon rank-sum; Wilcoxon matched-pairs signed-ranks T

Question 18

For a one-tailed Wilcoxon rank-sum test with n1 = 10 and n2 = 10, what is the critical value?

Accepted Answer

A)  87 or higher 
B)  87 or lower 
C)  82 or higher 
D)  82 or lower 
A)  87 or higher 
B)  87 or lower 
C)  82 or higher 
D)  82 or lower

Question 19

For a one-tailed Wilcoxon rank-sum test with n1 = 6 and n2 = 6, what is the critical value?

Accepted Answer

A)  28 or higher 
B)  28 or lower 
C)  26 or higher 
D)  26 or lower 
A)  28 or higher 
B)  28 or lower 
C)  26 or higher 
D)  26 or lower

For a two-tailed Wilcoxon matched-pairs signed-ranks T test with N = 28, what is the critical value?

Imagine you conduct a one-tailed Wilcoxon rank-sum test with the following results: W_s (n₁= 8 and n₂= 8) = 55. What should you conclude?

For a one-tailed Wilcoxon matched-pairs signed-ranks T test with N = 20, what is the critical value?

Imagine you conduct a two-tailed Wilcoxon matched-pairs signed-ranks T test with the following result: T (N = 18) = 38. What should you conclude?

Both the _ test and the _ test are used with ordinal data to compare two groups.

Imagine you conduct a one-tailed Wilcoxon matched-pairs signed-ranks T test with the following result: T (N = 12) = 18. What should you conclude?

How are the degrees of freedom for the Wilcoxon rank-sum test determined?

Both the _ test and the _ test are used with between-subjects designs.

Both the _ test and the _ test are used with within-subjects designs.

Imagine you conduct a Wilcoxon rank-sum test with the following results: W_s (n₁= 5 and n₂= 5) = 18. What should you conclude?

Explain when it would be appropriate to use the Friedman test and the Kruskal-Wallis test.

Both the _ test and the _ test are used with ordinal data to compare more than two groups.

For a one-tailed Wilcoxon rank-sum test with n₁= 10 and n₂= 10, what is the critical value?

For a one-tailed Wilcoxon rank-sum test with n₁= 6 and n₂= 6, what is the critical value?

Science and Statistics

Organizing Data, Variables and Measurement

Measures of Central Tendency

Measures of Variation

Standard Scores Z Scores

Probability, Hypothesis Testing and Inferential Statistics

The Single-Sample Z Test

The Single-Sample T Test

The T Test for Independent Groups Samples

T Test for Correlated Groups Samples

Comparing More Than Two Groups

One-Way Between-Subjects Analysis of Variance Anova

One-Way Repeated Measures Anova

Using Designs With More Than One Independent Variable and Two-Way Between-Subjects Anova

Correlational Research and Correlation Coefficients

Advanced Correlational Techniques: Regression Analysis

Chi-Square Tests

Filters

Exam 18: Tests for Ordinal Data

For a two-tailed Wilcoxon matched-pairs signed-ranks T test with N = 28, what is the critical value?

Imagine you conduct a one-tailed Wilcoxon rank-sum test with the following results: Ws (n1 = 8 and n2 = 8) = 55. What should you conclude?

For a one-tailed Wilcoxon matched-pairs signed-ranks T test with N = 20, what is the critical value?

Imagine you conduct a two-tailed Wilcoxon matched-pairs signed-ranks T test with the following result: T (N = 18) = 38. What should you conclude?

Both the _____ test and the _____ test are used with ordinal data to compare two groups.

Imagine you conduct a one-tailed Wilcoxon matched-pairs signed-ranks T test with the following result: T (N = 12) = 18. What should you conclude?

How are the degrees of freedom for the Wilcoxon rank-sum test determined?

Both the _____ test and the _____ test are used with between-subjects designs.

Both the _____ test and the _____ test are used with within-subjects designs.

Imagine you conduct a Wilcoxon rank-sum test with the following results: Ws (n1 = 5 and n2 = 5) = 18. What should you conclude?

Explain when it would be appropriate to use the Friedman test and the Kruskal-Wallis test.

Both the _____ test and the _____ test are used with ordinal data to compare more than two groups.

For a one-tailed Wilcoxon rank-sum test with n1 = 10 and n2 = 10, what is the critical value?

For a one-tailed Wilcoxon rank-sum test with n1 = 6 and n2 = 6, what is the critical value?

Science and Statistics

Organizing Data, Variables and Measurement

Measures of Central Tendency

Measures of Variation

Standard Scores Z Scores

Probability, Hypothesis Testing and Inferential Statistics

The Single-Sample Z Test

The Single-Sample T Test

The T Test for Independent Groups Samples

T Test for Correlated Groups Samples

Comparing More Than Two Groups

One-Way Between-Subjects Analysis of Variance Anova

One-Way Repeated Measures Anova

Using Designs With More Than One Independent Variable and Two-Way Between-Subjects Anova

Correlational Research and Correlation Coefficients

Advanced Correlational Techniques: Regression Analysis

Chi-Square Tests

Filters

Imagine you conduct a one-tailed Wilcoxon rank-sum test with the following results: W_s (n₁= 8 and n₂= 8) = 55. What should you conclude?

Both the _ test and the _ test are used with ordinal data to compare two groups.

Both the _ test and the _ test are used with between-subjects designs.

Both the _ test and the _ test are used with within-subjects designs.

Imagine you conduct a Wilcoxon rank-sum test with the following results: W_s (n₁= 5 and n₂= 5) = 18. What should you conclude?

Both the _ test and the _ test are used with ordinal data to compare more than two groups.

For a one-tailed Wilcoxon rank-sum test with n₁= 10 and n₂= 10, what is the critical value?

For a one-tailed Wilcoxon rank-sum test with n₁= 6 and n₂= 6, what is the critical value?