Answered: Assume that both populations are…

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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Assume that both populations are normally distributed. (a) Test whether μ1≠μ2 at the α=0.05 level of significance for the given sample data. (b) Construct a 95% confidence interval about μ1−μ2.			Population 1	Population 2
n	13	13
x	14.9	20.4
s	4.3	4.2

(a) Test whether

μ1≠μ2

at the

α=0.05

level of significance for the given sample data.

Determine the null and alternative hypothesis for this test.

H0:μ1≠μ2

H1:μ1=μ2

H0:μ1=μ2

H1:μ1>μ2

H0:μ1=μ2

H1:μ1≠μ2

Your answer is correct.

H0:μ1≠μ2

H1:μ1>μ2

Detemine the P-value for this hypothesis test.

(Round to three decimal places as needed.)

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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