The assembly time for a product is uniformly distributed between 6 to 10 minutes. The standard deviation of assembly time (in minutes) is approximately
A) 1.3333.
B) 1.1547.
C) 0.1111.
D) 0.5773.

Question

Quizplus · Accepted Answer

The standard deviation of a uniform distribution is given by the formula:
SD = (b-a)/sqrt(12)
where a and b are the minimum and maximum values of the distribution.

In this case, a = 6 and b = 10, so:
SD = (10-6)/sqrt(12) = 4/sqrt(12) = 1.1547 (approx.)

Therefore, the best choice is B.

The Assembly Time for a Product Is Uniformly Distributed Between