# 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 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

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

## Answer to relevant Questions

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