(Solution Library) The following shows the monthly sales in units of six salespersons before and after a bonus plan was introduced. At 95% confidence, construct
Question: The following shows the monthly sales in units of six salespersons before and after a bonus plan was introduced. At 95% confidence, construct the interval for the difference in the Matched Pairs.
| Monthly Sales | ||
| Salesperson | After | Before |
| 1 | 94 | 90 |
| 2 | 82 | 84 |
| 3 | 90 | 84 |
| 4 | 76 | 70 |
| 5 | 79 | 80 |
| 6 | 85 | 80 |
Subtract the two columns to get the differences. Then just plug those into List 1 in your calculator to find the average of the differences (d-bar) and the standard deviation would be S d . Then just build the interval.
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