The IRS was interested in the number of individual tax forms prepared by small accounting firms. The IRS randomly sampled 42 public accounting firms with 10 or fewer employees in the Dallas-Fort Worth area. The following frequency table reports the results of the study.
Number of Clients Frequency
16 up to 22 - 5
22 up to 28 -8
28 up to 34 - 12
34 up to 40 - 14
40 up to 46 - 3
Estimate the mean and the standard deviation. (Round squared deviations to nearest whole number and final answer to 2 decimal places.)
Mean = 31.2857
Standard
deviation = 6.7974 |
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