The average speed of vehicles traveling of Interstate 5 Freeway (I-5) in California is 73 miles/hour and the standard deviation

Question

The average speed of vehicles traveling of Interstate 5 Freeway (I-5) in California is 73 miles/hour and the standard deviation is 4.8 miles/hour. Assume the speeds are normally distributed. 
Write each answer in a complete sentence.
a. What is the probability a vehicle is traveling under 78 miles/hour?

Kunduz · Accepted Answer

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