MNM, Inc Has Three Stores Located in Three Different Areas

Essay

MNM, Inc. has three stores located in three different areas. Random samples of the daily sales of the three stores in $1,000) are shown below.
$$\begin{array} { c c c } \text { Store 1 } & \text { Store 2 } & \text { Store 3 } \\9 & 10 & 6 \\8 & 11 & 7 \\7 & 10 & 8 \\8 & 13 & 11\end{array}$$ At 95% confidence, test to see if there is a significant difference in the average sales of the three stores. Use both the critical and p-value approaches.