Answered: Q.3.1 The following contingency table…

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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Q.3.1 The following contingency table gives the results of a sample survey of South African male & female respondents with regard to their regular mode of transport:

Regular Mode of Transport:

	Car	Bus	Taxi	Total
No. of Females	50	100	10	160
No. of Males	75	95	70	240
Total	125	195	80	400

Q.3.1.1 What is the probability of randomly selecting a male respondent from the sample?

Q.3.1.2 What is the probability of randomly selecting a respondent from the sample who travels by taxi?

Q.3.1.3 What is the probability of randomly selecting a respondent who is female and uses a taxi?

Q.3.1.4 What is the probability of selecting a respondent who is male, given that they travel by bus?

Q.3.1.5 What is the probability of selecting a respondent who is female or who travels by taxi?

Q.3.1.6 What is the probability of randomly selecting a respondent from the sample who does not travel by taxi?

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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