Find the mean age in years from the frequency distribution given below:
Age (in yrs) 15-19 20-24 25-29 30-34 35-39 40-44 45-49 Total
Frequency 3 12 21 15 5 4 2 3
Answers
Given : Age (in yrs) 15-19 20-24 25-29 30-34 35-39 40-44 45-49
Frequency 3 12 21 15 5 4 2 3
To find : mean age in years
Solution:
Class Mean Class Freq f A = (mean -32)/5 A *f
15 - 19 17 3 -3 -9
20 - 24 22 12 -2 -24
25 - 29 27 21 -1 -21
30 - 34 32 15 0 0
35 - 39 37 5 1 5
40 - 44 42 4 2 8
45 - 49 47 2 3 6
Total 62 -35
Mean = 32 + 5 * (-35)/62
= 32 - 2.82
= 29.18
mean age in years = 29.18
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Answer: 66.8
Step-by-step explanation:
see image for step by step answer