ch02 - STA 2023 - Holbrook Data Chapter 2 2-1 Key Terms STA...

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Unformatted text preview: STA 2023 - Holbrook Data Chapter 2 2-1 Key Terms STA 2023 - Holbrook • • • 2-2 Variable – a characteristic of an individual population unit. individual Categorical data – measurements classified into a category. (qualitative data) data) Quantitative data – measurements recorded on a naturally occurring numerical scale. (numerical data) numerical Examples STA 2023 - Holbrook • Page 8, Blue Table 2-3 (Page 7, Table 2.1 – First Edition) The “W’s” (and one “H”) STA 2023 - Holbrook • Who, What, Where, When, How and Who, Why Why 2-4 Who STA 2023 - Holbrook • • Who is in the data? Individuals (people), subjects, Individuals respondents (in surveys), participants, experimental units (animals, plants, inanimate objects) inanimate 2-5 What STA 2023 - Holbrook • • What variables are being measured? Columns of the data table (categorical Columns or quantitative). or 2-6 STA 2023 - Holbrook • • • Where, When, How, and Why Who and What are most important. But the more information we can get, But the better. the When and Where were the data When collected? collected? 2-7 Where, When, How, and Why STA 2023 - Holbrook • How was the data collected? • Why was the data collected? • Survey, experiment, observational study What questions are researchers trying to What answer. answer. Where, When, How and Why can not Where, always be answered. always 2-8 Examples STA 2023 - Holbrook • Page 16-17, Problem #’s 8 and 16. 2-9 Page 12, Problem #’s 2 and 8. – First Edition End of Chapter Any blank slides that follow are blank intentionally. ...
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