A researcher administers a treatment to a sample of participants selected from a population with µ = 80. If a hypothesis test is used to evaluate the effect of the treatment, which combination of factors is most likely to result in rejecting the null hypothesis?   a. a sample mean much different than 80 for a small sample   b. a sample mean near 80 for a small sample   c. a sample mean near 80 for a large sample   d. a sample mean much different than 80 for a large sample

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