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Class IntervalClass Frequency Class Interval Class Frequency 50 - 59 2 60 - 69 9 70 - 79 15 80 - 89 12 90 -
Class IntervalClass Frequency
Class Interval
Class Frequency
50 - 59
2
60 - 69
9
70 - 79
15
80 - 89
12
90 - 99
7
class IntervalClass Frequency
The class width of the frequency distribution is
.
The cumulative frequency of the fourth class interval is
.
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