The IRS was interested in the number of individual tax forms prepared by small accounting firms. The IRS randomly sampled 55 public accounting firms with 10 or fewer employees in the Dallas-Fort Worth area. The following frequency table reports the results of the study. |
Estimate:
mean?
standard deviation?
Number of Clients | Frequency |
3 | 15 up to 30 |
15 | 30 up to 45 |
24 | 45 up to 60 |
9 |
60 up to 75 |
4 75 up to 90
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