A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed
Question:
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of µ = 80 and a standard deviation of σ = 20. The researcher expects a 12-point treatment effect and plans to use a two-tailed hypothesis test with α = .05.
a. Compute the power of the test if the researcher uses a sample of n = 16 individuals. (See Example 8.6.)
b. Compute the power of the test if the researcher uses a sample of n = 25 individuals.
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a For a sample of n 16 the standard error would be 5 points and the c...View the full answer
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Related Book For 
Statistics For The Behavioral Sciences
ISBN: 9781111830991
9th Edition
Authors: Frederick J Gravetter, Larry B. Wallnau
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