-What Is the Within-Group Variance for the Three Coffee Machines

Multiple Choice

$$\begin{array} { l } \text { A vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of cofee . The data are given below . } \\\end{array}$$

$\begin{array}{ccc}\hline \text { Machime A } & \text { Machune B } & \text { Machúe } \mathrm{C} \\\hline 11.8 & 11.7 & 12.2 \\12.1 & 11.9 & 12.1 \\12.0 & 11.7 & 12.0 \\11.9 & 11.8 & 11.9 \\12.1 & 120 & 12.2 \\\hline\end{array}$
-What is the within-group variance for the three coffee machines?

A) 0.017
B) 0.0136
C) 0.13
D) 0.029