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Exploring Data with Graphs and Numerical Summaries (STA 215, Chapter 2)

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Levels of Measurement

Visualizing Qualitative vs. Quantitative Data

Frequency Distributions

Histograms

Bar Graphs and Pareto Charts

Pie Charts

Frequency Polygons

Dot Plots

Stemplots (Stem-and-Leaf Plots)

Time-Series Graph

Mean

Median

Mode

Standard Deviation

Interpreting Standard Deviation

Percentiles & Quartiles

Boxplots