Recent research suggests that Americans make an average of 10 phone calls per day (CNN, August 26,

Question:

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? LO5

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question
Question Posted: