Aresearcher administers a treatment to a sample of participants selected from a population with m=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 a=.05
b. a sample mean much different than 80 with a=.05
c. a sample mean much different than 80 with a=.01
d. a sample mean near 80 with a=.01