A researcher administers a treatment to a sample of participants selected from a population with µ = 80.If the researcher obtains a sample mean of M = 88,which combination of factors is most likely to result in rejecting the null hypothesis?
A)σ = 5 and α = .01
B)σ = 5 and α = .05
C)σ = 10 and α = .01
D)σ = 10 and α = .05

Question

Quizplus · Accepted Answer

A larger standard deviation (σ) makes it harder to find significant differences, and a higher alpha level (α) makes it easier to reject the null hypothesis. Therefore, a smaller σ (5) and a higher α (.05) increase the likelihood of rejecting the null hypothesis.

A Researcher Administers a Treatment to a Sample of Participants