Question

Customers arrive at a Service Ontario centre with inter-arrival times averaging 5 minutes. The variance of the inter-arrival times is equal to 9 minutes squared. What is the coefficient of variation for the inter-arrival times?

Answer 1

The coefficient of variation for the inter-arrival times is 60%.

Step-by-step explanation:

The coefficient of variation (CV) measures the relative variability of a data set compared to its mean. It is calculated by dividing the standard deviation by the mean and multiplying by 100. In this case, the mean inter-arrival time is 5 minutes and the standard deviation is the square root of the variance (9 minutes squared), which is 3 minutes. Therefore, the CV is (3 / 5) * 100 = 60%.