A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.9years, and standard deviation of 0.7 years.If you randomly purchase one item, what is the probability it will last longer than 4 years?

Let X be the random variable from normal distribution with mean (μ) = 3.9 and standard deviation (σ)…

Answered: A manufacturer knows that their items…

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 3.9 years, and standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?