Question

26. Find the mean age from the following frequency distribution:
Age (in years)
25-29 30-34 35-39 40-44 45-49 50-54 55-59
Number of persons
4
14
22
16
6
5
3
HINT Change the given series to the exclusive series.​

Answer 1

Answer:

class interval Mid-point

x

i

Frequency

f

i

f

i

x

i

25-29 27 14 378

30-34 32 22 704

35-39 37 16 592

40-44 42 6 252

45-49 47 5 235

50-54 52 3 156

55-59 57 4 228

Σf

i

=70 Σf

i

x

i

=2545

Mean=

Σf

i

Σf

i

x

i

=

70

2545

=36.36