Consider the Following Results for Two Samples Randomly Taken from Two

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.