Exam 18: Nonparametric Methods: Analysis of Ranked Data

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 computed value of t? ________

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 value of the sum of the differences?

To determine whether four population means are equal, a sample from each population was selected at random. Using the Kruskal-Wallis test, H was computed to be 2.09. What is our decision at the 0.05 level of risk?

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 null hypothesis is:

The sign test is an appropriate nonparametric test for dependent samples.

In testing the significance of Spearman's rank-order coefficient, what is the alternate hypothesis? ______________________

A Spearman's rank-order correlation coefficient of 0.91 indicates a very weak relationship.

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 sum of the ranks for Formula A? _______

When testing H₀: Median equals $12.40 and the alternate hypothesis: Median does not equal $12.40, what is the critical value of z at the 10% level of significance?

In the Kruskal-Wallis test, the degrees of freedom are

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

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 rank order correlation?

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 the sum of the ranks for flavor #2?

We can apply parametric tests, such as the t test, to ordinal or ranked level of measurement.

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

The distribution of the sample statistic (H) for the Kruskal-Wallis test is approximately equal to the

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 value of ?

Two movie reviewers gave their ratings (0 to 4 stars) to seven movies released this past month as follows: The Wilcoxon signed-rank test of difference is to be used. What is your decision at the 5% level of significance? __________

A data set has six values: 10, 12, 21, 26, 26, and 26. What ranks would be assigned to 26?

A nonparametric test cannot be applied when the data are