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# Frequency Distibution Problems

30.Determine the estimated mean of the following frequency distribution

class frequency
0 up to 5 2
5 up to 10 7
10 up to 15 12
15 up to 20 6
20 up to 25 3

93. compute the range, the standard deviation, and the variance

Each person who applies for an assembly job at carolina furniture inc is given a mechanical aptitude test. one part of the test involves assembling a dresser based on numbered instructions. a sample of the lengths of time it took 42 persons to assemble the dresser was organized into the following frquency distribution.

length of time(minutes) frequency

2 up to 4 4
4 up to 6 8
6 up to 8 14
8 up to 10 9
10 up to 12 5
12 up to 14 2

105.
a. determine the mean, median, and the standard deviation
b determine the coefficient of skewness using pearsons method
c. determine the coefficient of skewness using the software method

listed below are the commissions earned(\$000) last year by the sales representatives at the furniture patch.

\$3.9 \$5.7 \$10.6 \$13.0 \$13.6 \$15.1 \$15.8 \$17.1
14.4 17.6 22.3 38.6 43.2 87.7

254. a telephone number consist of seven digits, the first three representing the exchange. how many different telephone numbers are possible within the 537 exchange?

#### Solution Summary

Frequency distributions are investigated. The solution is detailed and well presented.

\$2.19