If x, the time (in minutes)to complete an oil change job at a certain auto service station, is uniformly distributed over the interval 20 to 30, inclusively (20$\le$ x $\le$30), then the height of this distribution, f(x), is ___.
A)1/10
B)1/20
C)1/30
D)12/50
E)1/60

Question

Quizplus · Accepted Answer

For a uniform distribution over an interval [a, b], the height of the distribution, f(x), is given by 1/(b-a). Here, a=20 and b=30, so f(x) = 1/(30-20) = 1/10.

If X, the Time (In Minutes)to Complete an Oil Change ≤\le≤

If X, the Time (In Minutes)to Complete an Oil Change $\le$