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Answer to Question #80474 in Statistics and Probability for Tracey
Question #80474
The Average lifetime of a particular brand of car battery is 3 years with a standard deviation of 6 months. Assuming these lifetimes are normally distributed, calculate the:
a) percentage of these batteries that last more than 4 years
b) maximum lifetime of a battery to be in the 10% of batteries with the shortest lifetime
a) percentage of these batteries that last more than 4 years
b) maximum lifetime of a battery to be in the 10% of batteries with the shortest lifetime
Expert's answer
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