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 with α = .05
B)a sample mean near 80 with α = .01
C)a sample mean much different than 80 with α = .05
D)a sample mean much different than 80 with α = .01

Question

Quizplus · Accepted Answer

A sample mean much different than 80 with α = .05 is more likely to reject the null hypothesis because the difference from the population mean suggests a treatment effect, and a higher alpha level (.05) makes it easier to reject the null hypothesis compared to .01.

A Researcher Administers a Treatment to a Sample of Participants