A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.2 years, and standard deviation of 1.7 years.If 12 items are picked at random, 5% of the time their mean life will be less than how many years?Give your answer to one decimal place. A manufacturer knows that their items have a normallydistributed lifespan, with a mean of 11.2 years, andstandard deviation of 1.7 years.If 12 items are picked at random, 5% of the time their meanlife will be less than how many years?Give your answer to one decimal place.

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Answered: A manufacturer knows that their items…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.2 years, and standard deviation of 1.7 years. If 12 items are picked at random, 5% of the time their mean life will be less than how many years? Give your answer to one decimal place.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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