Incidents involving serious engine problems on the DD-340 aircraft are rare.They occur at an average rate of 3.0 per year (or .25 incidents per month).Assume all Poisson conditions are met.Compute the average time, in months, between incidents.
A)5.1
B)6.2
C)3.2
D)4
E)4.8

Question

Quizplus · Accepted Answer

The average time between incidents is the reciprocal of the average rate of incidents per month. Since the rate is 0.25 incidents per month, the average time between incidents is 1 / 0.25 = 4 months.

Incidents Involving Serious Engine Problems on the DD-340 Aircraft Are