Question

the average amount of precipitation in Dallas, Texas during the month of april is 3.2 inches. Assume that a normal distribution applies and that the standard deviation is .9 inches. What percentage of the time does the amount of rainfall in april exceed 5 inches?

Answer 1

Let X denote the random variable representing the amount of precipitation (in inches) in Dallas, Texas during the month of April.

Now, we are given that:

Thus, the percentage of time the amount of rainfall in April exceeds 5 inches is given by:

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