The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the standard deviation?
A) 8.66 minutes
B) 75 minutes
C) 135 minutes
D) 270 minutes

Question

Quizplus · Accepted Answer

The standard deviation of a uniform distribution can be found using the formula sqrt((b-a)^2/12), where a is the minimum value and b is the maximum value. 
Plugging in the values, we get sqrt((150-120)^2/12) = sqrt(900/12) = 8.66. Therefore, the standard deviation is 8.66 minutes.

The Time to Fly Between New York City and Chicago