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A mobile phone company finds the lifespan for one brand of its mobile phones is normally distributed with a mean of 48,400 hours (approx, 5.5 years) and a standard deviation of 5000 hours. A.) If the manufacturer is willing to replace no more than 10% of the mobile phones, what should be the approximate number of hours for a warranty? Answer in

A mobile phone company finds the lifespan for one brand of its mobile phones is normally distributed with a mean of 48,400 hours (approx, 5.5 years) and a standard deviation of 5000 hours. A.) If the manufacturer is willing to replace no more than 10% of the mobile phones, what should be the approximate number of hours for a warranty? Answer in

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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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A mobile phone company finds the lifespan for one brand of its mobile phones is normally distributed with a mean of 48,400 hours (approx, 5.5 years) and a standard deviation of 5000 hours. A.) If the manufacturer is willing to replace no more than 10% of the mobile phones, what should be the approximate number of hours for a warranty? Answer in whole number. B.) What is the probability that a mobile phone will last between 36,400 hours and 44,400 hours? Answer in four decimal. C..) What is the probability that a mobile phone will last at least 55,900 hours? Answer in four decimal.
Transcribed Image Text:A mobile phone company finds the lifespan for one brand of its mobile phones is normally distributed with a mean of 48,400 hours (approx, 5.5 years) and a standard deviation of 5000 hours. A.) If the manufacturer is willing to replace no more than 10% of the mobile phones, what should be the approximate number of hours for a warranty? Answer in whole number. B.) What is the probability that a mobile phone will last between 36,400 hours and 44,400 hours? Answer in four decimal. C..) What is the probability that a mobile phone will last at least 55,900 hours? Answer in four decimal.
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