Question

calculate arithmetic mean from the following data (age in years)
more than:- 0, 5, 10, 15, 20, 25, 30
frequency:- 100, 95, 85 ,71, 51, 16, 1

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Answer 1

Answer:

It is a more than cumulative frequency series, first u need to make it a simple continuous series.

Explanation:

X. F m Fm

0-5 5 2.5 12.5

5-10 10 7.5 75

10-15 14. 12.5 175

15-20 20 17.5 350

20-25 35 22.5 787.5

25-30 15 27.5 412.5

30-35 1 32.5 32.5

total =100 total = 1845

Mean = Total Fm / Total F

= 1845 / 100

=18.45

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