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Safari File Edit View History BookmarksWindow Help ng.cengage.com MINDTAP O Chapter 20 Problem Set Due Tomorrow at 4 PM EDT Back to Assignment Attempts: Keep the Highest: /2 9. Measures of effect size for distribution-free tests Which of the following is not a measure of effect size for a study that compares differences in central tendency between two independent populations (using, for example, an t test for independent samples or a Mann-Whitney test)? O An estimate of Cohen's d O The difference in means between the two samples O A confidence interval for the difference in means between the two populations O Whether or not you reject the null hypothesis Many standard measures of effect size, such as Cohen's d and omega squared, don't apply to distribution-free tests, because Flash Player MAC 29,00,140 2016 Aplia All rights reserved. Grade It Now Save & Continue Continue without saving

Explanation / Answer

1. The correct answer is Option 4. Whether or not one rejects the null hypothesis is not an indicator of the effect size of the study.

2. Standard measures of effect size such as Cohen's d and omega squared is not appropriate for distribution-free tests since it requires normal distribution and is based on means.

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