Guitars R US Has Three Stores Located in Three Different Areas

Essay

Guitars R. US has three stores located in three different areas. Random samples of the sales of the three stores (in $1000) are shown below: $$\begin{array} { c c c } \text { Store 1 } & \text { Store 2 } & \text { Store 3 } \\80 & 85 & 79 \\80 & & 86 \\& & 85 \\& & 76 \\& & 81 \\& & 88 \\& & 89 \\& & 80\end{array}$$ At a 5% level of significance, test to see if there is a significant difference in the average sales of the three stores. (Please note that the sample sizes are not equal.)