A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13 years, and standard deviation of 2 years. If you randomly purchase one item, what is the probability it will last longer than 9 years? (Give answer to 4 decimal places.)

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13 years,
and standard deviation of 2 years.
If you randomly purchase one item, what is the probability it will last longer than 9 years? (Give answer
to 4 decimal places.)
Transcribed Image Text:A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13 years, and standard deviation of 2 years. If you randomly purchase one item, what is the probability it will last longer than 9 years? (Give answer to 4 decimal places.)
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