The null hypothesis for the Kruskal–Wallis H test is that the sum of scores above and below the mode is equal.
Answer
Correct Answer:
False
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The null hypothesis for the Kruskal–Wallis H test is that the sum of scores above and below the mode is equal.
Answer
Correct Answer:
False
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The Friedman test compares differences in the sum of ranks in two or more related groups.
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Correct Answer:
True
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A researcher computes Wilcoxon T = 15 and finds that this value is smaller than the critical value. The decision is to reject the null hypothesis.
Answer
Correct Answer:
True
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Ordinal data do not meaningfully convey the distance that scores deviate from their mean, i.e., the variance.
Answer
Correct Answer:
True
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Nonparametric tests are used when the measured data are on a ratio scale of measurement.
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Correct Answer:
False
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The test statistic for the Friedman test is smallest when:
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Correct Answer:
The ranks for each participant are not consistent across groups.
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For a Kruskal–Wallis H test, we are more likely to reject the null hypothesis when:
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Correct Answer:
The more uneven the dispersion of ranks between two or more independent groups.
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To compute the test statistic for the Mann–Whitney U test, we sum the ranks in two groups. The decision to reject or retain the null hypothesis is based on:
Answer
Correct Answer:
The smaller total.
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The two-independent-sample t test is the parametric alternative to which nonparametric test?
Answer
Correct Answer:
Mann–Whitney U
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A researcher computes the Wilcoxon signed-ranks t test, and finds that the sum of positive ranks is 10 and the sum of negative ranks is 42. What is the value of the test statistic, T?
Answer
Correct Answer:
10
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For the Wilcoxon signed-ranks T, the ________ the value of T, the more likely we are to reject the null hypothesis.
Answer
Correct Answer:
Smaller
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A researcher computes a related-samples sign test in which the number of positive ranks is 4 and the number of negative ranks is 13. The test statistic (x) is equal to:
Answer
Correct Answer:
13
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A researcher computes a one-sample sign test in which the number of pluses is 3, the number of minuses is 5, and the number of scores equal to the median is 1. The test statistic (x) for the sign test is equal to:
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Correct Answer:
5
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Tests for ordinal data:
Answer
Correct Answer:
Are nonparametric tests.
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The following are not appropriate tests for ordinal data, except:
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Correct Answer:
The Friedman test, one-sample sign test, Mann–Whitney U test
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Wilcoxon Signed-Ranks T Test is used as a nonparametric alternative to _____
Answer
Correct Answer:
Related Samples t test
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Wilcoxon Signed-Ranks T Test is used as a nonparametric alternative to _____
Answer
Correct Answer:
Related Samples t test
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Sign Test is used as a nonparametric alternative to_____
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Correct Answer:
Both b and c
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Mann-Whitney U Test is used as a nonparametric alternative to_____
Answer
Correct Answer:
Two-independent-sample t test
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Kruskal-Wallis H Test is used as a nonparametric alternative to_____
Answer
Correct Answer:
One-way between-subjects ANOVA
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Friedman Test is used as a nonparametric alternative to _____
Answer
Correct Answer:
One-way within-subjects ANOVA
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