A Vending Machine Company Wants to Check Three of Its

Multiple Choice

A vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of coffee. Their data is given below.
$\begin{array}{ccc}\hline \text { Machine A } & \text { Machine B } & \text { Machine C } \\\hline 11.8 & 11.7 & 12.2 \\12.1 & 11.9 & 12.1 \\12.0 & 11.7 & 12.0 \\11.9 & 11.8 & 11.9 \\12.1 & 12.0 & 12.2 \\\hline\end{array}$

Is there a significant difference between the vending machines $\mathrm { A } , \mathrm { B }$ , and $\mathrm { C }$ ? Use $\alpha = 0.05$

A) The $F$ -test cannot be used to answer whether or not there is a significant difference between the means.
B) No, there is no significant difference between the means.
C) Yes, there is a significant difference between the means.