Monthly rainfalls in a locality are independent and identically distributed normal variates with mean  20 cm and variance 12 cm2. Determine the probability that 220 cm of rainfall occurs over a period of  6 months. What is the probability of having less than 18 cm rainfall each month for a period of 6  months?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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Monthly rainfalls in a locality are independent and identically distributed normal variates with mean 
20 cm and variance 12 cm2. Determine the probability that 220 cm of rainfall occurs over a period of 
6 months. What is the probability of having less than 18 cm rainfall each month for a period of 6 
months?

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