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.
$$\begin{array} { c c c }
\hline \text { Moming } & \text { Aftermoon } & \text { Evening } \
\hline 25 & 25 & 27 \
26 & 24 & 26 \
27 & 18 & 24 \
26 & 20 & 23 \
27 & 23 & 25 \
\hline
\end{array}$$
-What is the between-group variance for the data given above.
A) 23.40
B) 46.80
C) 3.90
D) 7.18

Question

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.
 $$\begin{array} { c c c } 
\hline \text { Moming } & \text { Aftermoon } & \text { Evening } \
\hline 25 & 25 & 27 \
26 & 24 & 26 \
27 & 18 & 24 \
26 & 20 & 23 \
27 & 23 & 25 \
\hline
\end{array}$$
-What is the between-group variance for the data given above.
A) 23.40
B) 46.80
C) 3.90
D) 7.18

Quizplus · Accepted Answer

The between-group variance is the variance between the means of the three groups. The mean of the morning group is 26, the mean of the afternoon group is 22, and the mean of the evening group is 24. The variance between the means is 23.40.

The Head of the English Department Wants to Determine If