The probability that an individual is left-handed is 0.13. In a class of 70 students, what is the mean and standard deviation of the number of left-handed students? Round to the nearest hundredth When necessary.
A) mean: 9.1; standard deviation: 2.81
B) mean: 70; standard deviation: 3.02
C) mean: 70; standard deviation: 2.81
D) mean: 9.1; standard deviation: 3.02

Question

Quizplus · Accepted Answer

The mean number of left-handed students is 0.13 * 70 = 9.1. The standard deviation is sqrt(0.13 * 0.87 * 70) = 2.81.

The Probability That an Individual Is Left-Handed Is 0