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Reserve Problems Chapter 4 Section 5 Problem 2 A laptop company claims up to 10.2 hours...

Reserve Problems Chapter 4 Section 5 Problem 2

A laptop company claims up to 10.2 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 9.5 hours and standard deviation 24 minutes.


(a) What is the probability that the battery life is at least 10.2 hours?

Round your answer to four decimal places (e.g. 98.7654).


(b) What is the probability that the battery life is less than 8.8 hours?

Round your answer to four decimal places (e.g. 98.7654).


(c) What is the time of use that is exceeded with probability 0.9?

Round your answer to two decimal places (e.g. 98.76).

Math   Statistics-And-Probability   
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