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Chapter 24

# Chapter 24 - Chapter 24 Notes(Student Categorical Variables...

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Chapter 24 Notes (Student) 1 Categorical Variables • To analyze categorical data, calculate frequencies (counts) and percents of individuals that fall into various categories. • Example: Level of Satisfaction of Americans 100% 600 Total 44% 263 Dissatisfied 56% 337 Satisfied Percent Frequency Two-Way Tables • When there are two categorical variables, the data are summarized in a two-way table. • The number of observations falling into each combination of categories is entered into each cell of the table. Example: Level of Satisfaction and Geographic Region of U.S. 600 150 150 150 150 Total 263 67 57 66 73 Dissatisfied 337 83 93 84 77 Satisfied Total West Midwest South East Level of Satisfaction Region An economist want to gauge the level of satisfaction of Americans. He randomly samples 150 people 18 years old or older from 4 geographic regions of the U.S. He ask the selected individuals, “Are you satisfied or dissatisfied with the ways things are going in the U.S. at this time?” The following table gives the results of the survey.

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Chapter 24 - Chapter 24 Notes(Student Categorical Variables...

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