Consider the Data Table Shown with Values for Five Individuals

Multiple Choice

Consider the data table shown with values for five individuals measured in each of four groups (A, B, C, and D) . We will conduct an ANOVA analysis of this.
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$\begin{array}{c}\text { Groups }\\\begin{array}{rrrr}\text { A } & \text { B } & \text { C } & \text { D } \\6 & 7 & 9 & 11 \\8 & 10 & 11 & 14 \\10 & 11 & 12 & 15 \\12 & 12 & 13 & 16 \\14 & 15 & 15 & 19\end{array}\end{array}$ ​
-What is the group mean square?

A) 17.50
B) 19.33
C) 21.50
D) 23.33