Treatment Placebo P2 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 simple random samples selected from normally distributed n 33 36 populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.01 significance level for both parts. x 2.32 2 63 0.98 0.64 a. Test the claim that the two samples are from populations with the same mean. What are the null and alternative hypotheses? O A Ho: H1 = P2 O B. HO: Hi * H2 OC. Ho:P1= P2 OD. HO: H1 Pa The test statistic, t. is (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) State the conclusion for the test. O A. Reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. O B. Fail to reject the null hypothes . There is not sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. O C. Reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. O D. Fail to reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that the two samples are from populations with the same mean. b. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean. Click to select your answerts)