Question 1

Patricia has collected data on 30 individuals.She measured the pulse rate of 15 individuals after they had watched a violent film clip.She measured the pulse rate of the other 15 people after they had watched a non-violent film clip.Because she knows her study does not meet the assumptions for a two-tailed t-test,what nonparametric test should she run?
A)Wilcoxon T
B)A two-way 
C)A Mann-Whitney U
D)a Friedman

Accepted Answer

The Mann-Whitney U test is a nonparametric test used to determine if there is a significant difference between two independent groups. It is the appropriate choice when the assumptions of a two-tailed t-test are not met, which is the case in this scenario where the data is not normally distributed. The Wilcoxon T and Friedman tests are not appropriate for this scenario as they are used for dependent samples and three or more related groups, respectively. The two-way ANOVA is not appropriate as there are only two groups being compared.

Question 2

If you wanted to run determine if there is a relationship between participants' commute time to work and their level of hostility and you need to use a nonparametric test,what test should you run?
A)Spearman 
B)Wilcoxon T
C)a Friedman 
D)Kruskal-Wallis H

Accepted Answer

The answer of If you wanted to run determine if...

Question 3

The nonparametric procedure that corresponds to the related samples t-test is the
A)Mann-Whitney U.
B)Wilcoxon T test.
C)Kruskal-Wallis H.
D)Friedman  .

Accepted Answer

The Wilcoxon signed-rank test is the nonparametric equivalent of the related samples t-test. It is used to compare the median difference between two related populations. The Mann-Whitney U test, Kruskal-Wallis H test, and Friedman test are all nonparametric procedures, but they are used for different types of comparisons (independent samples, more than two related samples, and more than two related samples with repeated measures, respectively).

Question 4

James has conducted a study involving a total of 60 participants.These individuals were randomly assigned to one of three different treatment conditions--No Sound,White Noise,or Conversation.Each was then tested on a reading recall task.Because James knows his study does not meet one of the assumptions for a parametric test,what nonparametric test should he run?
A)Mann-Whitney U
B)Spearman 
C)a Friedman 
D)Kruskal-Wallis H

Accepted Answer

The answer of James has conducted a study involving a...

Question 5

You have treadmill endurance test scores for 14 college students taken just before final exam period and a second set of scores for the same students obtained on the afternoon of the last day of finals.You are pretty sure that the populations these scores are sampled from are highly skewed,and so you plan to test for differences in physical endurance using a nonparametric procedure.Which one should you use?
A)A Wilcoxon T
B)Spearman 
C)A Mann-Whitney U
D)A Friedman

Accepted Answer

The answer of You have treadmill endurance test scores for...

Question 6

The nonparametric procedure that corresponds to the within-subjects ANOVA is the
A)Mann-Whitney U.
B)Wilcoxon T.
C)Kruskal-Wallis H.
D)Friedman  .

Accepted Answer

The Friedman test is the nonparametric equivalent of the within-subjects ANOVA as it compares repeated measures within a single group. The Mann-Whitney U test (A) and Wilcoxon T test (B) are nonparametric tests for independent samples, and the Kruskal-Wallis H test (C) is a nonparametric test for comparing three or more independent groups.

Question 7

The nonparametric procedure that corresponds to the between-subjects ANOVA is the
A)Mann-Whitney U.
B)Wilcoxon T.
C)Kruskal-Wallis H.
D)Friedman  .

Accepted Answer

The Kruskal-Wallis H test is a nonparametric alternative to the between-subjects ANOVA. It is used to determine whether there are significant differences between three or more groups in terms of a dependent variable. The Mann-Whitney U and Wilcoxon T tests are nonparametric alternatives to the independent-samples t-test and paired-samples t-test, respectively. The Friedman test is a nonparametric alternative to the repeated-measures ANOVA.

Question 8

In Tanisha's study,each person's respiration rate was tested for baseline (no exercise),after 5 minutes of strenuous exercise,and 5 minutes after strenuous exercise had stopped.Because her study does not meet one of the assumptions for a parametric test,what nonparametric test should she run?
A)Mann-Whitney U
B)Wilcoxon T
C)a Friedman 
D)Kruskal-Wallis H

Accepted Answer

The study involves testing the same group of individuals three times, which violates the assumption of independence required for a parametric test. Therefore, a nonparametric test that can handle repeated measures, such as the Friedman test, would be appropriate. The Mann-Whitney U test is for comparing two independent groups, the Wilcoxon T test is for comparing two related groups, and the Kruskal-Wallis H test is for comparing more than two independent groups.

Question 9

When a Mann-Whitney U test is significant,we accept
A)our samples are independent.
B)our data represent the predicted difference between our conditions in the population.
C)our samples are not independent.
D)our data do not represent the predicted difference between our conditions in the population.

Accepted Answer

A significant Mann-Whitney U test indicates that there is a significant difference between two conditions in the sample. Since the Mann-Whitney U test is a nonparametric test, it does not assume that the data are normally distributed or that the variances are equal. However, it does assume that the samples are independent, and a significant result suggests that the difference observed in the sample is likely to reflect a real difference in the population. Therefore, we can accept that our data represent the predicted difference between our conditions in the population, represented by choice B.

Quiz 15: Chi Square and Other Nonparametric Procedures

If you wanted to run determine if there is a relationship between participants' commute time to work and their level of hostility and you need to use a nonparametric test,what test should you run?

The nonparametric procedure that corresponds to the related samples t-test is the

The nonparametric procedure that corresponds to the within-subjects ANOVA is the

The nonparametric procedure that corresponds to the between-subjects ANOVA is the

In Tanisha's study,each person's respiration rate was tested for baseline (no exercise) ,after 5 minutes of strenuous exercise,and 5 minutes after strenuous exercise had stopped.Because her study does not meet one of the assumptions for a parametric test,what nonparametric test should she run?

When a Mann-Whitney U test is significant,we accept