It is estimated that 40% of households own a riding lawn mower. A sample of 13 households is studied. What is the mean number of households who own a riding mower?
A) 3.12
B) 13
C) 1.7664
D) 5.2

Question

Quizplus · Accepted Answer

The mean number of households who own a riding mower can be calculated by multiplying the total number of households by the proportion that own a riding mower. 
In this case: 
Mean = Total households x Proportion 
Mean = 13 x 0.4 
Mean = 5.2

Therefore, the best choice is D (5.2).

It Is Estimated That 40% of Households Own a Riding