SOLUTION: Suppose that the talk time on a cellphone is normally distributed with a mean of 6 hours and a standard deviation of 1.5 hours. What is the probability a fully charged cellphone wi

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Question 1142154: Suppose that the talk time on a cellphone is normally distributed with a mean of 6 hours and a standard deviation of 1.5 hours. What is the probability a fully charged cellphone will last more than 5 hours?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd or (5-6)/1.5 or >=-1/1.5 or >-2/3
That probability is 0.7475