21. The frequency distribution representing the number of frequent flier miles accumulated by employees at Brumley Statistical Consulting Inc. is repeated from Exercise 17.

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21. The frequency distribution representing the number of frequent flier miles accumulated
by employees at Brumley Statistical Consulting Inc. is repeated from Exercise 17.
Frequent Flier Miles
(000)
Frequency
O up to 3
3 up to 6
6 up to 9
9 up to 12
12 up to 15
5
12
23
8
2
Total
50
a. How many employees accumulated less than 3,000 miles?
b. Convert the frequency distribution to a cumulative frequency distribution.
c. Portray the cumulative distribution in the form of a cumulative frequency polygon.
d. Based on the cumulative relative frequencies, about 75% of the employees
accumulated how many miles or less?
Transcribed Image Text:21. The frequency distribution representing the number of frequent flier miles accumulated by employees at Brumley Statistical Consulting Inc. is repeated from Exercise 17. Frequent Flier Miles (000) Frequency O up to 3 3 up to 6 6 up to 9 9 up to 12 12 up to 15 5 12 23 8 2 Total 50 a. How many employees accumulated less than 3,000 miles? b. Convert the frequency distribution to a cumulative frequency distribution. c. Portray the cumulative distribution in the form of a cumulative frequency polygon. d. Based on the cumulative relative frequencies, about 75% of the employees accumulated how many miles or less?
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