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Compute the Power of the Test

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A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o= 20. The researcher expects a 12 point treatment effect and plans to use a two-tailed hypothesis test with a = .05.

a. Compute the power of the test if the researcher uses a sample of n = 16 individuals
b. Compute the power of the test if the researcher uses a sample of n = 25 individuals.

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The expert computes the power of the tests using 16 and 25 individual samples. A complete, neat and step-by-step solution is provided in the attached file.

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A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o= 20. The researcher expects a 12 point treatment effect and plans to use a two-tailed hypothesis test with a = .05.

a. Compute the power of the test if the researcher ...

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