18166727
Beschreibung
Quiz von Katie Morbey, aktualisiert more than 1 year ago
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Erstellt von Katie Morbey
vor fast 5 Jahre
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Frage 1
Frage
Assuming the data meet the assumptions of parametric tests, non-parametric tests, compared to their parametric counterparts ___________
Antworten
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Have less statistical power
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All of the above
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Are less likely to accept the alternative hypothesis
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Are more conservative
Frage 2
Frage
A researcher measured leadership skills in police officers, doctors, and accountants. The data were skewed. What is the most appropriate test to analyse the data?
Antworten
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Mann-Whitney test
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Kruskal-Wallis test
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Friedman test
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Wilcoxon test
Frage 3
Frage
The results of the test used to analyse the data described in Question 2 showed a significant result. How should the researcher carry out post-hoc tests?
Antworten
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Compare groups using the Mann Whitney test
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Compare groups using the Wilcoxon test
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Compare groups using a t-test
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None of the above. Post-hoc analyses cannot be carried out with non-parametric data
Frage 4
Frage
An advantage of non-parametric statistics is that _________
Antworten
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You need a computer to calculate them
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They are very powerful
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They have many assumptions to meet
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They are easy to calculate
Frage 5
Frage
Which of the following tests is analogous to a standard within-subjects ANOVA?
Antworten
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Wilcoxon
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Kruskal-Wallis
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Friedman
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Mann-Whitney
Frage 6
Frage
Tied scores (when two or more scores have the same value) may present a problem in non-parametric tests. The way to deal with them in a Kruskal-Wallis test is to ____________
Antworten
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Assign any tied values the lower of the ranks they would have received had they not been tied
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Use a random number table to assign ranks to the tied values
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Throw out the tied data
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Assign any tied values the average of the ranks they would have received had they not been tied
Frage 7
Frage
A dataset contains the following values: 23, 28, 37, 23, 45, 49, 37, 62. Rank the values. Which rank is associated with value 37?
Antworten
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4.5
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6
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3.5
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4
Frage 8
Frage
Researchers wanted to examine whether the ‘see-food’ diet was effective. A group of volunteers were placed on the diet and their weight (in kilograms) was measured at the beginning of the diet, after 1 month, after 2 months, then at the end of the diet after 3 months. The data were not normally distributed. Which test would be appropriate to analyse this data?
Antworten
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Mann-Whitney
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Wilcoxon
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Friedman
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Kruskal-Wallis
Frage 9
Frage
n a Kruskal-Wallis test, the _________ the value of H, the more likely you are to reject the null hypothesis
Antworten
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More negative
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Smaller
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H is not relevant for the Kruskal-Wallis test
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Larger
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