Answered: a. State the decision rule. Use the…

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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Eight observations were randomly selected from populations that were not necessarily normally distributed. Use the 0.05 significance level, a two-tailed test, and the Wilcoxon rank-sum test.


Population A:	38	45	56	57	61	69	70	79
Population B:	26	31	35	42	51	52	57	62

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a. State the decision rule. Use the 0.05 significance level. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.)

H₀: The distributions are the same.
H₁: The distributions are not the same.

Hg: The distributions are the same.
H1: The distributions are not the same.
Reject Ho if z <
or z>

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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