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A study was done using a treatment group and a placebo group. The results are shown...

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

0.010.01

significance level for both parts.

Treatment

Placebo

muμ

mu 1μ1

mu 2μ2

n

2727

3535

x overbarx

2.392.39

2.632.63

s

0.850.85

0.540.54

math   Statistics-And-Probability   
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