It is estimated that 30% of households own a riding lawn mower. A sample of 14 households is studied. What is the standard deviation of the number of households who
Own a riding lawn mower?
A) 2.94
B) 1.7146
C) 14
D) 4.2

Question

Quizplus · Accepted Answer

The standard deviation for a binomial distribution is calculated using the formula: √(n * p * (1-p)), where n is the number of trials (households), and p is the probability of success (owning a riding lawn mower). Here, n = 14 and p = 0.3. So, the standard deviation is √(14 * 0.3 * 0.7) = 1.7146.

It Is Estimated That 30% of Households Own a Riding