101 Ch. 2 - • There are two types of variables –...

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Chapter Two Data
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What are Data? Data are values along with their context Data are information collected in a context Values, by themselves, are meaningless Data should answer the “Five W’s” Who, What, When, Where, Why, sometimes How
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Data Tables Name Title Age Gender Income Tim Janitor 22 M $27,000 Gloria HR Manager 54 F $39,000 Jerry Tech Support 42 M $48,000 Jacob Sales 21 M $29,000 Janine Sales 30 F $34,000
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Who The first column is the individuals . They are also known as: respondents if they answered a survey subjects or participants if an experiment was performed on them experimental units if they are non-human subjects (animals, plants, etc.) sometimes referred to as observations
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What Variables are the characteristics recorded about each individual
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Unformatted text preview: • There are two types of variables: – Categorical AKA qualitative variables: cannot be measured by numerical methods • Ex: race, sex, colors – Quantitative : can be measured by numerical methods • Ex: height, weight, income Data Tables Categorical Variables: Title, Gender Quantitative Variables: Age, Income Name Title Age Gender Income Tim Janitor 22 M $27,000 Gloria HR Manager 54 F $39,000 Jerry Tech Support 42 M $48,000 Jacob Sales 21 M $29,000 Janine Sales 30 F $34,000 Where, When, Why and How • When and where the data were collected may have an impact on its interpretation • Why the data were collected alerts to potential problems in how the data were collected...
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101 Ch. 2 - • There are two types of variables –...

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