Births in the US occur at an average rate of 7.5 births per minute (Source: Census.gov, 2013).Assume all the Poisson conditions are met.What is the expected time (in minutes) between one birth and the next?
A)0.13 minutes
B)0.55 minutes
C)7.5 minutes
D)10.4 minutes
E)13.3 minutes

Question

Quizplus · Accepted Answer

The expected time between one birth and the next is the reciprocal of the average rate of births. Therefore, the expected time is 1/7.5 = 0.13 minutes.

Births in the US Occur at an Average Rate of 7.5