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 near 80 for a small sample
B)a sample mean near 80 for a large sample
C)a sample mean much different than 80 for a small sample
D)a sample mean much different than 80 for a large sample

Question

Quizplus · Accepted Answer

A sample mean much different than 80 for a large sample is most likely to result in rejecting the null hypothesis because a large sample size increases the power of the test, making it easier to detect a significant effect.

A Researcher Administers a Treatment to a Sample of Participants