Answered: The number of hours that students…

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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The number of hours that students studied for final exams was normally distributed. Of the 200 students surveyed, the mean number of hours they studied was 12 hours. The standard deviation was 3 hours.

A) Sketch the curve.

B) What percent of students studied between 9 and 15 hours?

C) What percent of students studied less than 9 hours?

D) What percent of students studied 3 hours or less?

E) What percent of students studied between 15 and 18 hours?

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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