Consider the Following Results for Two Samples Randomly Taken from Two

question 36

Short Answer

Consider the following results for two samples randomly taken from two normal populations with equal variances.
$\begin{array}{lcc}&\text { Sample I }&\text { Sample II }\\\text { Sample Size } & 28 & 35 \\\text { Sample Mean } & 48 & 44 \\\text { Population Standard Deviation } & 9 & 10\end{array}$
a. Develop a 95% confidence interval for the difference between the two population means.
b. Is there conclusive evidence that one population has a larger mean? Explain.

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