Question: This frequency distribution represents the data obtained from a sample of 75 copying machine service technicians. The values represent the days between service calls for

This frequency represents the data obtained from a sample of 75 copying machine service technicians. The values represent the days between service calls for various copying machines.
Class boundaries Frequency
15.5–18.5 ......14
18.5–21.5 ......12
21.5–24.5 ......18
24.5–27.5 ......10
27.5–30.5 ......15
30.5–33.5 ........6
Find the :
Mean
Modal class

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