Answered: The test score (X) of the training…

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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Question

The test score (X) of the training participants has a normal distribution with an average value of 200 and a standard deviation of 50. Participants are declared passed if they get a score > 300 and those who have a score of 200-300 are given a retest. To get the percentage of participants who passed or who were given a retest, it can be known through the standard normal distribution Z. It is known that P(Z < 0)=0.5000 and P(Z < -2.0) = 0.0228. The percentage of the number of test participants who passed was

97,72 %
2,28 %
50 %
/other

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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