chpt 2 - In Number of Years - Where, When, Why, and How...

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8/19/09 1 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? • Are Data Numbers? • Are Data Labels? The Five W’s of Data Who • Individuals • Surveys – • Experiments – • Experiments – • Databases – • Cases What • _____________ – characteristics about each individual. • _____________ Variables – Recorded as labels. • _____________ Variables – Recorded and used as numbers – Measurement units (ex. cm or in)
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8/19/09 2 Examples • ______________ – Gender – Marital Status • ______________ – Age – Height Examples • Quantitative or Categorical? • Age – In Number of Years - – Child or Adult – • Educational Level – HS, Some College, Bachelors, Advanced Degree –
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Unformatted text preview: In Number of Years - 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? Example In 2000 Dr. Linda D. Voss and Dr. Jean Mulligan, researchers at Southampton General Hospital, conducted a study that tried to answer the question: Do short kids get bullied more than everyone else? The researchers measured all the students and classified each student as either short or not short. Voss and Mulligan also asked each student whether or not the student had ever been bullied. Example Who Example (cont.) What 8/19/09 3 Example (cont.) Where Example (cont.) When Example (cont.) Why Example (cont.) How Whats next? What do the data look like? What can the data tell us? How can we describe data using different graphs? How can we describe data using different numbers?...
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chpt 2 - In Number of Years - Where, When, Why, and How...

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