A medical researcher is studying a new drug which she believes will decrease outbreaks in people who suffer from acne. She obtains two samples of acne sufferers. Group one, consisting of 8 individuals, applies a daily facial cream which contains the active ingredient. Group two, consisting of 6 individuals, applies the same facial cream except that it does not contain the active ingredient.

a.Write the symbolic notation for the null and alternative hypotheses.

b.If t_obt = -2.84 and alpha = .01, was there a significant effect? How do you know?