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 distribution's 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 is equal to the difference between the maximum and minimum values divided by the square root of 12. 
Therefore, the standard deviation is (150-120)/sqrt(12) = 8.66 minutes.

The Time to Fly Between New York City and Chicago