Question

The number of members in the 40 families in Bhilar are as follows:

1, 6, 5, 4, 3, 2, 7, 2, 3, 4, 5, 6, 4, 6, 2, 3, 2, 1, 4, 5, 6, 7, 3, 4, 5, 2, 4, 3, 2, 3, 5, 5, 4, 6, 2, 3, 5, 6, 4, 2. Prepare a frequency table and find the mean of members of 40 families.

Answer 1

Number of members `bb((x_i))`	Number of families `bb((f_i))`	`bb(f_ix_i)`
1	2	2
2	8	16
3	7	21
4	8	32
5	7	35
6	6	36
7	2	14
	N = 40	`sum f_ix_i` = 156

Since mean = `(sum f_ix_i)/"N"`

= `156/40`

= 3.9

So, the mean of members of 40 families is 3.9.