Treatment | Placebo 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 populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.10 significance level for both parts. 2.33 2.63 0.51 0.83 . Reject the nun nypolesis. I nere is sumoenteviverIve w warrant igjevon of the vain ulat ure two samples are Ium populanuns with me baine mean. b. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean. ( Round to three decimal places as needed.)