Lesson 5: Bell-Shaped Curves and Statistical Pictures

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  • Read Chapters 8 and 9 in the text.
  • Work through the Lesson 5 online notes that follow.
  • Complete all lesson assignments as listed in the Canvas Module

Learning Objectives

Chapters 8 and 9

After successfully completing this lesson, you should be able to:

  • Interpret standard scores as a measure of relative standing on a list.
  • Apply the relationship between standard scores and the percentiles of a normal distribution.
  • Interpret graphs used with categorical data.
  • Interpret scatterplots.
  • interpret time series plots and recognize trends and seasonality.
  • critique whether graphical presentations provide a fair summary of the data.

Terms to Know

click on the terms to learn more

From Chapter 8

  • normal (bell-shaped) distribution
  • empirical rule
  • percentiles
  • standard score (Z-score)

From Chapter 9

  • categorical data (variables)
  • pie chart
  • bar graph
  • pictogram
  • line graphs (time series plots)
  • scatterplots
  • positive versus negative association (relationship)