Exam 16: Nonparametric Methods: Analysis of Ordinal Data

Using the following data, the Wilcoxon signed-rank hypothesis test is used to test the hypothesis that there is no difference between the before and after populations. What are the sum of the ranks?

The test statistic for the Wilcoxon signed-rank test is the _________ statistic.

The Wilcoxon signed-rank test of differences requires that the data be at least ordinal scaled and that the two samples be related.

In the Wilcoxon signed-rank test, the ranks:

In the Kruskal-Wallis test for the following data, what is the sum of the ranks for Sample 1?

The following are the ratings (0 to 4) given by 12 individuals for two possible new flavors of soft drinks. Wilcoxon rank-sum is to be used. At the 0.05 level of significance, what is the decision?

Fifty-five voters from a sample of 80 indicated that they favored casino gambling in their city. The city council is interested in finding out whether or not there is a significant difference between the proportions of those favoring and not favoring casino gambling in their community. μ in this scenario is ______.

A soap manufacturer is experimenting with several formulas of soap powder. Three of the formulas were selected for further testing by a panel of homemakers. The ratings for the three formulas are as follows: What is the value of H?

Using the following data, the Wilcoxon signed-rank hypothesis test is used to test the hypothesis that the test results of a treatment after training are greater than the test results before the treatment. The Wilcoxon critical value is 3 for n = 7 with a 0.05 significance level. What decision should be made regarding the null hypothesis?

The ________ difference between "before and after" measurements is evaluated in a sign test.

The Wilcoxon rank-sum test compares two dependent populations.

A one-tailed sign test is used to test for differences between two populations at the 0.10 level of significance. There were nine pluses and five minuses. What is the decision regarding the null hypothesis?

The Kruskal-Wallis one-way analysis of variance by ranks is especially appropriate to test whether three or more population means are equal if the data is measured with an ordinal scale and/or the populations are not normal.

A hypothesis test that rho is zero is conducted at the 5% level of significance. If Spearman's (rho) is 0.50 for a sample of 15 observations, what is the critical value?

The Wilcoxon rank-sum test computes a z test statistic.

In the Kruskal-Wallis test for the following data, what is the sum of the ranks for Sample 3?

Using the following data, the Wilcoxon signed-rank hypothesis test is used to test the hypothesis that the test results of a treatment after training are greater than the test results before the treatment. The Wilcoxon critical value is 3 for n = 7 with a 0.05 significance level. What decision should be made regarding the null hypothesis?

The alternate hypothesis states that the correlation between two populations is greater than zero. The test of significance is one-tailed.

Fifty-five voters from a sample of 80 indicated that they favored casino gambling in their city. The city council is interested in finding out whether or not there is a significant difference between the proportions of those favoring and not favoring casino gambling in their community. The test statistic is ______.

What is a requirement that must be met before the Kruskal-Wallis one-way analysis of variance by ranks test can be applied?