Question: 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

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 distributedpopulations, and do not assume that the population standard deviations are equal. Complete parts Use a 0.05 significance level for both parts

Treatment Placebo

U U1 u2

n 27 34

x over bar 2.33 2,65

s 0.92 0.62

Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean.

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