(Steps Shown) A randomly selected sample of 50 hospital employees were asked how many miles they commute to work each day. The results are summarized in
Question: A randomly selected sample of 50 hospital employees were asked how many miles they commute to work each day. The results are summarized in this table:
| Miles | Frequency | |
| 3-7 | 5 | |
| 8-12 | 15 | |
| 13-17 | 12 | |
| 18-22 | 11 | |
| 23-27 | 7 |
[a] Find the mean, median, variance and standard deviation.
[b] Find the 21 st percentile.
[c] Find the 89 th percentile.
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