Treatment | Placebo K A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent H2 simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete 35 30 parts (a) and (b) below. Use a 0.01 significance level for both parts. 2.37 2.66 S 0.62 0.99 What are the null and alternative hypotheses? O A. HO: Hy

H 2 Hy: My