The highest recorded tempeature during the month of July for

The highest recorded tempeature during the month of July for a given year in Death Valley, in California, has an approximately normal distribution with a mean of 123.8 degree F (!) and standard deviation of 3.1 degree F.

A. What is the proability for a given year that the temperature never exceeds 120 degrees F in a given July in Death Valley?

B. What is the probability for a given year that the temperature in Death Valley goes above 128 degrees F during July in a randomly chosen year?

Solution