Concept explainers
A researcher plans to conduct an experiment evaluating the effect of a treatment. A sample of n = 9 participants is selected and each person receives the treatment before being tested on a standardized dexterity task. The treatment is expected to lower scores on the test by an average of 30 points. For the regular population, scores on the dexterity task form a
a. If the researcher uses a two-tailed test with α – .05, what is the power of the hypothesis test?
b. Again assuming a two-tailed test with α – .05, what is the power of the hypothesis test if the
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Chapter 8 Solutions
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