What is the statistical recurrence interval for a flood of rank 2 in a data set that is 99 years long?
A) on average, once every 10 years
B) on average, once every 20 years
C) on average, once every 30 years
D) on average, once every 40 years
E) on average, once every 50 years

Question

Quizplus · Accepted Answer

The recurrence interval is calculated as (N+1)/M, where N is the number of years (99) and M is the rank (2). So, (99+1)/2 = 50 years.

What Is the Statistical Recurrence Interval for a Flood of Rank