Number of families In a village in correspondence with the number of c – InterviewSolution

InterviewSolution

1.

Number of families In a village in correspondence with the number of children are given below.No of children012345No of families1125321051Find the mean number of children per family.

Answer»

No. of children x_i	No. of families f_i	x₁f_i
0	11	0
1	25	25
2	32	64
3	10	30
4	5	20
6	1	5

Σf_i = 84

Σf_ix_i = 144

\(\overline x = \frac {\sum f_ix_i}{\sum f_i} = \frac {144}{84}\)

Mean = 1.714285

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