81.3k views
1 vote
In one city, 24% of adult smoke. In groups of size 130 of adults , what is the variance of the number that smoke ?

User Exitos
by
7.7k points

1 Answer

5 votes

Answer:


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

User Nas Banov
by
7.4k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories