Consider the Following Results for Two Samples Randomly Taken from Two

question 146

Short Answer

Consider the following results for two samples randomly taken from two populations.
$\begin{array}{lcc}&\text { Sample A } & \text { Sample B } \\\text { Sample Size }&20 & 25 \\\text { Sample Mean }&28 & 22 \\\text { Sample Standard Deviation }&5 & 6\end{array}$
a. Determine the degrees of freedom for the t distribution.
b. At 95% confidence, what is the margin of error?
c. Develop a 95% confidence interval for the difference between the two population means.

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