The Head of the English Department Wants to Determine If

Multiple Choice

The head of the English department wants to determine if the average number of students taking
an English course differs depending upon the time of day that the course is being offered.
$$\begin{array} { c c c } \hline \text { Moming } & \text { Aftermoon } & \text { Evening } \\\hline 25 & 25 & 27 \\26 & 24 & 26 \\27 & 18 & 24 \\26 & 20 & 23 \\27 & 23 & 25 \\\hline\end{array}$$
-Given the between-group variance (determined in the previous question) and the fact that the F-test value is 6.00, what is the within-group variance for the three class times?

A) 23.40
B) 46.80
C) 3.90
D) 7.18