Answered: Giving a test to a group of 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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1 )Giving a test to a group of students, the grades and gender are summarized below

A B C Total
Male 12 16 10 38
Female 18 19 11 48
Total 30 35 21 86

If one student is chosen at random, calculate the following probability.

P(male OR got a C ) =

2) For a normal distribution with μμ = 49 and σσ = 3, determine the z-score of 52.384.

z-score =

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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