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Chapter 2: Frequency Distributions and Graphs (or making ...

Chapter 2: Frequency Distributions and Graphs (or making pretty tables and pretty pictures). Example: Titanic passenger data is available for 1310. individuals for 14 variables, though not all variables are recorded for all individuals. Consider the following variables: Survival, Sex, Number of relatives on board, Age Who wants to stare at a big dataset? If you have 1310 people measured for 14 variables, how much information are we going to get by looking at the data set? See for yourself: That's where tables that summarize the data and Graphs of these summaries come in handy!

Frequency distribution – the organization of raw data in table form, using classes and frequencies. Class – a quantitative or qualitative category. A class may be a range of numerical values (that acts like a “category”) or an actual category. Frequency – the number of data values contained in a specific class.

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