23. A researcher expects a treatment to increase scores by 5 points. The regular population, without treatment,

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23. A researcher expects a treatment to increase scores by 5 points. The regular population, without treatment, averages 40 with a standard deviation of  8, and the scores form a normal distribution. If the researcher uses a one-tailed test with  .01,

a. What is the power of the test for a sample of n 16?

b. What is the power of the test for a sample of n 64?

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Essentials Of Statistics For The Behavioral Sciences

ISBN: 9780495812203

7th Edition

Authors: Frederick J. Gravetter, Larry B. Wallnau

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