The annual precipitation amounts in a certain mountain rangeare normally distributed with a meanof 88 inches, and a standard deviationof 10 inches. What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
The mean of 25 random years is less than 90.8 is equal to saying tha the sum of 25 random years is less than 2270.
In other words, we have 25 normal distributions with mean = 88 and variance = 100. We …
This solution shows step-by-step calculations to determine the likelihood that the mean annual precipitation during 25 years is less than 90.8 inches.