4–27. Let X be a normally distributed random variable with mean 16 and standarddeviation 3. Find P(11 X 20). Also find P(17 X 19) and P(X 15). 4-27. Let X be a normally distributed random variable with mean µdard deviation o = 3. Find P(11 < X< 20). Also find P(17 < X< 19) and P(X> 15).4-28. The time it takes an international telephone operator to place an overseas phonecall is normally distributed with mean 45 seconds and standard deviation 10 seconds.16 and stan-%3D

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Answered: 4-27. Let X be a normally distributed…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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4–27. Let X be a normally distributed random variable with mean 16 and standard
deviation 3. Find P(11 X 20). Also find P(17 X 19) and P(X 15).

4-27. Let X be a normally distributed random variable with mean µ
dard deviation o = 3. Find P(11 < X< 20). Also find P(17 < X< 19) and P(X> 15).
4-28. The time it takes an international telephone operator to place an overseas phone
call is normally distributed with mean 45 seconds and standard deviation 10 seconds.
16 and stan-
%3D

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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