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Chapter 2

Chapter 2. Data. What should you be able to do at the end of this chapter?. Identify data. Identify variables. Determine whether data are used as quantitative or categorical variables. Identify the 5 W’s of data sets. What are Data?. Numbers? Labels?. The Five W’s of Data. Who What

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Chapter 2

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  1. Chapter 2 Data

  2. What should you be able to do at the end of this chapter? • Identify data. • Identify variables. • Determine whether data are used as quantitative or categorical variables. • Identify the 5 W’s of data sets.

  3. What are Data? • Numbers? • Labels?

  4. The Five W’s of Data • Who • What • When • Where • Why • How?

  5. Who • Individuals • Surveys – Respondents • Experiments – Human Subjects • Experiments – Experimental Units • Databases – Records • Cases

  6. What • Variables – characteristics about each individual. • Categorical Variables • Recorded as labels. • Quantitative Variables • Recorded and used as numbers • Measurement units (ex. cm or in)

  7. Examples • Categorical • Quantitative

  8. Examples • Quantitative or Categorical? • Age • In Number of Years - • Child or Adult – • Education Level • HS, Some College, Bachelors, Advanced Degree – • In Number of Years -

  9. Where, When, Why, and How • Questions to ask yourself • Where did the data come from? • When were the data collected? • How were the data obtained? • Why were the data gathered?

  10. What’s next? • What do the data look like? • What can the data tell us? • How can we describe the data using different graphs? • How can we describe the data using different numbers?

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