Answered: In a random sample of 80 Americans, 44…

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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In a random sample of 80 Americans, 44 wished that they were rich. In a random sample of 90 Europeans, 41 wished that they were rich. At ? = 0.01, is there a difference in the proportions?

Required Steps:

Step 1: Label all given information.

Step 2:State the null and alternative hypothesis and identify the claim.

Step 3:Verify that the conditions are met to perform the test.

Step 4:Sketch the normal distribution and find the critical regions.

Step 5:Compute the test statistic.

Step 6:Make a decision

Step 7:Summarize the results.

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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