Exam 17: Chi-Square and Other Nonparametric Tests

The value of f e for the cell in row W , column A is _________.

What distinguishes parametric from nonparametric tests? Give some examples.

Is it true that parametric tests are generally more powerful than nonparametric tests? If so, give two reasons why do we might choose to use a nonparametric test instead of a parametric test.

Parametric tests are more versatile than nonparametric tests.

The Kruskal-Wallis test requires there are at least 5 scores in each sample.

The c 2 test is _________.

A new drug is supposed to be effective in reducing motion sickness in people who are prone to such illness. A group of subjects are given a placebo and taken for a ride in a car over a preplanned route. At the end of the trip the subjects are asked to rate their illness on a 20-point scale. A week later the same subjects are given the new drug and taken for an identical ride and asked to rate their degree of illness again. The data are:

To answer this question, refer to the following data. Assume the data are being analyzed with the Mann-Whitney U test. The value of U _crit using a = 0.05_{2 tail} is _________.

In an independent groups experiment involving two groups, if chance alone were operating one would expect a great deal of overlap between the two sets of scores.

A student at a Midwest college is interested in whether Psychology majors spend more or less time studying than English majors. She randomly selects 8 Psychology majors and 8 English majors and determines their weekly studying time. The following are the scores. Note one person dropped out of the study. An analysis is being conducted using the Mann-Whitney U test. If a = 0.05 2 tail, U crit = _________.