Answered: Does mode of transportation depend on…

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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Does mode of transportation depend on political party? Researchers ask a group of people about how they get to work. They also group the people by their political party. The data are recorded in the contingency table below, and a chi-square Test of Independence at the 1% significance level is performed.

	Car	Public Transit	Walk	Row Total
Democrats	11	8	20	39
Republicans	5	22	9	36
Column Total	16	30	29	75

Select the correct null and alternative hypotheses for this test.

Select all that apply:

H0: The two variables are independent, so political party does not affect mode of transportation.

Ha: The two variables are dependent, so political party does affect mode of transportation.

H0: The two variables are dependent, so political party does affect mode of transportation.

Ha: The two variables are independent, so political party does not affect mode of transportation.

Definition Definition Measure of central tendency that is the value that occurs most frequently in a data set. A data set may have more than one mode if multiple categories repeat an equal number of times. For example, in a data set with five item—3, 5, 5, 29, 473—the mode is 5 because it occurs twice and no other value occurs more than once. On a histogram or bar chart, the element with the highest bar represents the mode. Therefore, the mode is sometimes considered the most popular option. The mode is useful for nominal or categorical data (e.g., the most common color car that users purchase), but it is problematic for continuous data because it is more likely not to have any value that is more frequent than the other.

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