So for the first one I found the z score then used the normal distribution table. How to solve ? 4. The lifetime of a AAA battery is normally distributed with mean µ = 26.5 hours and standarddeviation o = 4.2 hours.(a) For a battery selected at random, what is the probability that the lifetime will be at least 29hours?а.(b) For a battery selected at random, what is the probability that the lifetime will be between 25and 29 hours?b.(c) What is the probability that the mean lifetime i of batteries from a package of 13 will begreater than 26 hours?e for EstimatingX - X70,889MAY11wMacBook Air80888DIIDDF3F4F5FBF9F10F12*$&347de}ETYDFHJL>?C VNM日.. ..* CO8 :B

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Answered: The lifetime of a AAA battery is…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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So for the first one I found the z score then used the normal distribution table. How to solve ?

4. The lifetime of a AAA battery is normally distributed with mean µ = 26.5 hours and standard
deviation o = 4.2 hours.
(a) For a battery selected at random, what is the probability that the lifetime will be at least 29
hours?
а.
(b) For a battery selected at random, what is the probability that the lifetime will be between 25
and 29 hours?
b.
(c) What is the probability that the mean lifetime i of batteries from a package of 13 will be
greater than 26 hours?
e for Estimating
X - X
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4
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8 :
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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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