We have a normal distribution with mean = 88 and standard deviation = 14.Identify the scores at the 25th, 75th, and 95th percentiles.What percentage of the distribution falls below a score of X = 74.00?What percentage of scores are higher than X = 93.00?What percentage of cases lie between the mean and a score of 99.00?What percentage of cases fall between the scores of 86.50 and 92.50?

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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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We have a normal distribution with mean = 88 and standard deviation = 14.

Identify the scores at the 25th, 75th, and 95th percentiles.

What percentage of the distribution falls below a score of X = 74.00?

What percentage of scores are higher than X = 93.00?

What percentage of cases lie between the mean and a score of 99.00?

What percentage of cases fall between the scores of 86.50 and 92.50?

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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