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Category > Management Posted 03 Oct 2017 My Price 3.00

standard deviation

Recent research suggests that Americans make an average of 10 phone calls per day (CNN, August 26, 2010). Let the number of calls be normally distributed with a standard deviation of 3 calls.

 

a. What is the probability that an average American makes between 4 and 12 calls per day?

b. What is the probability that an average American makes more than 6 calls per day?

c. What is the probability that an average American makes more than 16 calls per day?

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Maurice Tutor
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Status NEW Posted 03 Oct 2017 10:10 PM My Price 3.00

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