Answered: For each of the following situations,…

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

For each of the following situations, state whether you would use a chi-square goodness-of-fit test, a chi-square test of homogeneity, a chi-square test of independence, or some other statistical test. Complete parts a) through c) below.

a) Is the quality of a car affected by what day it was built? A car manufacturer examines a random sample of the warranty claims filed over the past two years to test whether defects are randomly distributed across days of the work week. Choose the correct answer below.

Chi-square test of independence. You have data on two variables, day and quality, for one manufacturer.

Chi-square goodness-of-fit test. You want to see if the distribution of defects is uniform over the variable day.

Chi-square test of homogeneity. You have two samples and one variable, day. You want to see if the distribution of quality is the same in the two years.

Some other statistical test. The variable day is quantitative, not counts.

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