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1. From many long years of experience, the weather bureau knows that the temperature on the...

1. From many long years of experience, the weather bureau knows that the temperature on the 4th of July in Seattle is a normal random variable with μ=70 degree (Fahrenheit) and σ2=302. What is the probability that the temperature will be below freezing un Seattle on 4th of July?

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Answer #1

is what we want to find where

Note

But

Thus, we are looking for with

Looking up a normal table, we find is the required probability that it will be below freezing on July 4th in Seattle

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