Answered: A survey among freshman at a certain…

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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A survey among freshman at a certain university revealed that X: the number of hours spent studying in a week before final exams is normally distributed with average (mean) μ=20 hours and standard deviation σ=4.5 hours.

a) The 98th percentile of the number of hours spent by the freshman for their final exams is ["", "", "", ""]

b) Between ["", "", "", ""] and ["", "", "", ""] hours of studying for the finals by the freshman is the middle 60 percent.

c) The probability that a randomly chosen freshman spent more than 23 hours studying for their final exam is ["", "", "", ""] .

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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