The numbers of hours worked (per week) by 400 statistics students are shown below.
Number of hours
Frequency
0 - 9
20
10 - 19
80
20 - 29
200
30 - 39
100
?
The cumulative percent frequency for < 29 hours is
A. 50.
B. 75.
C. 200.
D. 300.
Answer: B
Business
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