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Question
Independent random samples of managers' yearly salaries (in $1000) taken from governmental and private organizations provided the following information. At 95% confidence, test to determine if there is a significant difference between the average salaries of the managers in the two sectors.| Government | Private | |
 | 80 | 75 |
| s | 9 | 10 |
| n | 28 | 31 |
Answer
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