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Test the given claim using the α=0.01 significance level and assuming that the populations are normally...

Test the given claim using the α=0.01 significance level and assuming that the populations are normally distributed.
Claim: The treatment population and the placebo population have the same mean.
Treatment group: n=6, x¯=119, s=5.8.
Placebo group: n=13, x¯=112, s=5.6.

(a) The test statistic is .

(b) What is the conservative estimate for the degrees of freedom? df =

(c) The negative critical value is .

(d) The positive critical value is .

(e) Is there sufficient evidence to warrant the rejection of the claim that the treatment and placebo populations have the same mean?

A. No

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