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Question

Consider the relative frequency distribution given below:
Class Interval Relative Frequency
20-under 40 0.2
40-under 60 0.3
60-under 80 0.4
80-under 100 0.1

There were 60 numbers in the data set. How many numbers were in the interval 40-under 60?
a) 30
b) 50
c) 18
d) 12
e) 15

Answer

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