Question

Use a calculator to solve the following problem. Do not use Z tables.

A hydrologist working for a corporate farm finds that the distribution of October rainfall totals, over the years for which she has records, is approximately normal with mean 3 inches and standard deviation 1. She supposes that, for each future October, its rainfall total is a random variable taken from this distribution.

a) Find the number such that the probability is 0.985 that next October’s rainfall is less than that number.

Please provide all steps used to find the solution to this problem (including the information plugged into the calculator.)

Answer 1