STATISTICAL TECHNIQUES AND TOOLS
TESTS OF SIGNIFICANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which one of the following actions will increase the power of a one-tailed t-test for a mean?
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Decrease the sample size
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Decrease the level of significance
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Increase effect size
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Use a two-tailed test
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Increase the probability of a Type II error
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Explanation:
Detailed explanation-1: -A one-tailed test increase more statistical power by reducing the critical test statistic value by placing the level of significance (probability of Type I error) in one-tail of the distribution.
Detailed explanation-2: -A test’s power can be increased in two ways: by increasing the sample size or by raising the significance level. As a result, increasing the power of a significance test with the help of the sigma’s significance level.
Detailed explanation-3: -Power depends on sample size. Other things being equal, larger sample size yields higher power.
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