Question
How much experience do supply-chain transportation managers have in their field? Suppose in an effort to...
How much experience do supply-chain transportation managers have
in their field? Suppose in an effort to estimate this, 41
supply-chain transportation managers are surveyed and asked how
many years of managerial experience they have in transportation.
Survey results (in years) are shown below. Use these data to
construct a 99% confidence interval to estimate the mean number of
years of experience in transportation. Assume that years of
experience in transportation is normally distributed in the
population.
| 8 | 8 | 10 | 21 | 20 |
| 25 | 14 | 6 | 19 | 3 |
| 5 | 9 | 11 | 2 | 3 |
| 13 | 2 | 4 | 9 | 4 |
| 5 | 4 | 21 | 7 | 6 |
| 3 | 28 | 17 | 29 | 2 |
| 25 | 8 | 13 | 17 | 27 |
| 7 | 3 | 15 | 4 | 13 |
| 6 |
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