A laptop company claims up to 9.1 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 8.5 hours and standard deviation 39 minutes. a. What is the probability that the battery life is at least 9.1 hours? b. What is the probability that the battery life is less than 7.9 hours? c. What is the time of use that is exceeded with probability 0.9?
A laptop company claims up to 9.1 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 8.5 hours and standard deviation 39 minutes. a. What is the probability that the battery life is at least 9.1 hours? b. What is the probability that the battery life is less than 7.9 hours? c. What is the time of use that is exceeded with probability 0.9?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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