Answered: Do the poor spend the same amount of…

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

Do the poor spend the same amount of time in the shower as the rich? The results of a survey asking poor and rich people how many minutes they spend in the shower are shown below.

Poor 9 18 17 25 25 17 32 27 38 26 30

Rich: 25 33 24 42 29 47 15 16 42 48 45 52

Assume both follow a Normal distribution. What can be concluded at the the αα = 0.10 level of significance level of significance?

For this study, we should use T-test what a difference between two independent population means

The test statistic t = (please show your answer to 3 decimal places.)

The p-value = (Please show your answer to 4 decimal places.)

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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