Answered: Test the claim about the means of two…

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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25. Test the claim about the means of two populations. Assume that two dependent samples have been randomly selected from a normally distributed population. Show work.

Five students took a math test before and after tutoring. Their scores were as follows:

Subject A B C D E

Before 77 69 66 72 69

After 81 78 64 75 81

Use a 0.01 level of significance to test the claim that tutoring improved the math scores.

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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