Summary statistics computed from two independent samples - 12009

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mareya

mareya

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Summary statistics computed from two independent samples are as follows: n1 = 50, x1 =

175, s1 = 18.5, n2 = 42, x2 = 158, and s2 = 32.4. Construct a 95% confidence interval estimate for

the difference between the means of two normally distributed populations, where the unknown

population variances are assumed to not be equal. The upper confidence limit is

A.   24.911. 

B.   28.212. 

C.   5.788.

D.   19.123.

 
Solution Description

Summary statistics computed from two independent samples are as follows: n1 = 50, x1 =