Answered: Draw a normal distribution curve and…

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

Draw a normal distribution curve and find the percentage of the bounded regions in each item. A large group of students took a test in General Chemistry and the final grades have a mean of 70 and a standard deviation of 10. if we can approximate the distribution, what percent of the students

a.) scored higher than 80?

b.) should pass the test (grades ≥ 60)

c.) should fail the test (grades < 60)?

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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