Suppose that the times required for a cable company to fix cable problems in the homes of its customers are uniformly distributed between 40 minutes and 65 minutes. What is the probability that a randomly selected cable repair visit falls within 2 standard deviations of the mean?
A) .75
B) 1.00
C) .58
D) .86

Question

Quizplus · Accepted Answer

M = (65 + 40)/2 = 52.5
σ == 7.22
P(μ − 2σ ≤ x ≤ μ + 2σ) = P(38.1 ≤ x ≤ 66.9) = 1

Suppose That the Times Required for a Cable Company to Fix