The probability that an individual is left-handed is 0.12. In a class of 10 students, what is the mean and standard deviation of the number of left-handed students? Round to the nearest hundredth
When necessary.
A)mean: 10; standard deviation: 1.1
B)mean: 1.2; standard deviation: 1.1
C)mean: 1.2; standard deviation: 1.03
D)mean: 10; standard deviation: 1.03

Question

Quizplus · Accepted Answer

The mean is calculated as np = 10 * 0.12 = 1.2. The standard deviation is calculated as sqrt(np(1-p)) = sqrt(10 * 0.12 * 0.88) ≈ 1.03.

The Probability That an Individual Is Left-Handed Is 0