The number of children in 10 families in a locality are 2,4,3,4,1,6,4,5,x,5 find x if the mean number o children in a family is 4

Question

Philoid · Accepted Answer

Given is the data of children present in 10 families in a locality.

Mean of number of children in a family = 4

Mean is given by

Where ∑x = Sum of all observations

& n = Total number of observations.

Here, n = 10

So,

⇒

⇒ 34 + x = 4 × 10

⇒ 34 + x = 40

⇒ x = 40 – 34

⇒ x = 6

Thus, x = 6.