The Following Information Regarding the Number of Semester Hours Taken $\begin{array}{cc}&\text { Day }&\text { Evening }\\&16 & 12 \\s&4 & 2 \\n&140 & 160\end{array}$

Short Answer

The following information regarding the number of semester hours taken from random samples of day and evening students is provided.
$\begin{array}{cc}&\text { Day }&\text { Evening }\\&16 & 12 \\s&4 & 2 \\n&140 & 160\end{array}$ Develop a 95% confidence interval estimate for the difference between the mean semester hours taken by the two groups of students.