1. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.9 years, and standard deviation of 1.3 years. If you randomly purchase one item, what is the probability it will last longer than 6 years? 2. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.8 years, and standard deviation of 0.7 years. The 3% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place.

1. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.9 years, and standard deviation of 1.3 years. If you randomly purchase one item, what is the probability it will last longer than 6 years? 2. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.8 years, and standard deviation of 0.7 years. The 3% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal place.

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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Question

1. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.9 years, and standard deviation of 1.3 years.

If you randomly purchase one item, what is the probability it will last longer than 6 years?

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.8 years, and standard deviation of 0.7 years.

The 3% of items with the shortest lifespan will last less than how many years?

Give your answer to one decimal place.

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