Question

In one city, 24% of adult smoke. In groups of size 130 of adults , what is the variance of the number that smoke ?

Answer 1

`X=24`

Explanation:

From the question we are told that:

Probability of having a smoker
`P(s)=0.24`

Sample size
`n=130`

Generally the equation for Variance X is mathematically given by

`X= np(1-p) =`

`X= (130)(0.24)(1-0.24)`

`X = 23.712`

`X=24`