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Descriptive Statistics

Chapter Outline

Statistics Versus Parameters

Two Fundamental Types of Numerical Data

Quantitative Data
Categorical Data

Techniques for Summarizing Quantitative Data

Frequency Polygons
Skewed Polygons
Histograms and Stem-Leaf Plots
The Normal Curve
Averages
Spreads
Standard Scores and the Normal Curve
Correlation

Techniques for Summarizing Categorical Data

The Frequency Table
Bar Graphs and Pie Charts
The Crossbreak Table








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