It is estimated that 40% of households own a riding lawn mower. A sample of 13 households is studied. What is the probability that more than 10 of these own a riding lawn mower?
A) 0.0078
B) 0.9922
C) 0.0013
D) 0.0001

Question

Quizplus · Accepted Answer

The probability of more than 10 households (i.e., 11 or 12 or 13 households) owning a riding lawn mower can be calculated using the binomial probability formula. Given the probability (p) of a single household owning a riding lawn mower is 0.40, and the number of trials (n) is 13, we calculate the probability for exactly 11, 12, and 13 households owning a mower and sum these probabilities. The calculations yield a very small probability, with the correct answer being approximately 0.0013, which matches option C.

It Is Estimated That 40% of Households Own a Riding