MA 102 Statistical Controversies Monday, February 25, 2002

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MA 102 Statistical ControversiesMonday, February
25, 2002

• Today
• Discuss charts and graphs
• Chapter 10 exercises
• Introduction to displaying distributions
• Reading (for Wednesday)
• Chapter 11 Displaying Distributions with Graphs
• Exercises 11.1, 11.2, 11.3, 11.4, 11.6, 11.8,
  11.12, 11.15, 11.16

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Chapter 10 Key Terms

• Categorical Variable
• E.g., state names, auto types, education levels
• Quantitative Variable
• E.g., stock prices, population
• To display distribution of a categorical
  variable, use pie chart or bar graph
• To display change in a quantitative variable over
  time, use a line graph.
• Pictogram (be skeptical)

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Chapter 11 Key Terms

• Distribution of a variable (what values, and how
  many times each value)
• To graph the distribution of a quantitative
  variable, use a histogram or a stem plot
• Outliers, shape, center, spread, symmetric, skewed

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