Exam 18: Nonparametric Methods: Analysis of Ranked Data

20 economists were sampled and asked to predict if the national economy would improve during the next twelve months. Eleven of the economists predicted an increase, two economists predicted no change, and seven economists predicted a decrease in the economy. Conduct a hypothesis test at the 0.10 significance level to determine if the majority of economists predict an increase. The correct analysis would be:

The Wilcoxon Rank-Sum uses the _____________ as the test statistic.

The Kruskal-Wallis H statistic follows the __________ distribution.

For a given set of twelve ranked data values, the sum of the squared differences is 63.18. What is Spearman's coefficient of rank correlation for the data?

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

Nonparametric tests require data that can be __________.

To test the hypothesis, the Wilcoxon Signed-Rank test uses a

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. What is the sum of the ranks?

The Spearman coefficient of rank correlation method ____________ the observations in each sample.

Spearman's rank-order correlation coefficient may assume a value from -1 to +1.

In the Wilcoxon Signed-Rank test, the ranks

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. What is W, if flavor #1 is identified as population 1?

This nonparametric test requires at least ordinal level data. t is used if the assumptions required for the paired t test cannot be met. Which test is it?

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 number of degrees of freedom? _______

Two movie reviewers gave their ratings (0 to 4 stars) to ten movies released this past month as follows: The rank order correlation is to be used. What is the critical value using a 0.05 level of significance?

Two movie reviewers gave their ratings (0 to 4 stars) to ten movies released this past month as follows: The rank order correlation is to be used. What is the null hypothesis for rank order correlation?

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 chi-square at the 5% level of significance? ________

The Wilcoxon signed-rank test requires the populations to be _____________.

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

When the paired observations are equal in a Wilcoxon Signed-Rank test hypothesis,