Suppose the average waiting time for a customer's call to be answered by a company representative (modeled by exponentially decreasing probability density functions) is 20 minutes. Find the median waiting time.
A) $13.86$ minutes
B) $17.86$ minutes
C) $15.86$ minutes
D) $16.86$ minutes
E) $14.86$ minutes

Question

Quizplus · Accepted Answer

The median of an exponential distribution with mean $\mu$ is given by $\mu \ln(2)$. Here, $\mu = 20$ minutes, so the median is $20 \ln(2) \approx 13.86$ minutes.

Suppose the Average Waiting Time for a Customer's Call to Be