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Question
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.
| Store 1 | Store 2 | Store 3 |
| 80 | 85 | 79 |
| 75 | 86 | 85 |
| 76 | 81 | 88 |
| 89 | 80 | |
| 80 |
a. Compute the overall sample mean 
.
b. At 95% confidence, test to see if there is a significant difference in the average sales of the three stores. Set up the complete ANOVA table. Please note that the sample sizes are not equal.
Answer
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