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Question
The following shows the monthly sales in units of six salespersons before and after a bonus plan was introduced. At 95% confidence, determine whether the bonus plan has increased sales significantly. (For the following matched samples, let the difference "d" be: d = after ï€before.)| Monthly Sales | ||
| Salesperson | After | Before |
| 1 | 94 | 90 |
| 2 | 82 | 84 |
| 3 | 90 | 84 |
| 4 | 76 | 70 |
| 5 | 79 | 80 |
| 6 | 85 | 80 |
Answer
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