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2.2A More Data Displays

2.2A More Data Displays. QUANTITATIVE data Histograms (freq., rel. freq.) Polygons (freq.) Ogive Stem & Leaf Plots Dot Plots Scatter plots Time Series Charts. QUALITATIVE data Pie charts Pareto Charts. Stem & Leaf Plots. EDA -Exploratory Data Analysis: John Tukey-77

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2.2A More Data Displays

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  1. 2.2A More Data Displays QUANTITATIVE data • Histograms (freq., rel. freq.) • Polygons (freq.) • Ogive • Stem & Leaf Plots • Dot Plots • Scatter plots • Time Series Charts QUALITATIVE data • Pie charts • Pareto Charts

  2. Stem & Leaf Plots • EDA -Exploratory Data Analysis: John Tukey-77 • Similar to histogram • Still has original data values • Each number is separated • Stem=left most digit(s) • Leaf = right most digit: unordered OR ordered • Variation: 2 rows each stem (leaf 0-4 and 5-9)

  3. Example: Unordered Stem & Leaf RBI’s for American League Leaders 7 8 Key: 15 5 = 155 8 Sample size = 9 10 5 8 9 9 9 Min= 11 6 4 2 2 8 8 9 3 7 8 9 9 2 Max= 12 9 6 2 6 2 1 6 2 6 3 1 4 4 9 6 13 0 9 9 3 4 2 3 14 4 5 2 0 5 8 7 15 5 9

  4. Example: Ordered Stem & Leaf RBI’s for American League Leaders 7 8 Key: 15 5 = 155 8 Sample size = 9 10 5 8 9 9 9 min= 11 2 2 2 3 4 6 7 8 8 8 9 9 9 max= 12 1 1 2 2 2 3 4 4 6 6 6 6 6 9 9 13 0 2 3 3 4 9 9 14 0 2 4 5 5 7 8 15 5 9

  5. Variation & Unordered 7 7 8 8 8 9 9 10 10 5 8 9 9 9 11 4 2 2 3 2 11 6 8 8 9 7 8 9 9 12 2 2 1 2 3 1 4 4 12 9 6 6 6 6 9 6 13 0 3 4 2 3 13 9 9 14 4 2 0 14 5 5 8 7 15 15 5 9

  6. Stem & Leaf Variation -Ordered 7 7 8 8 8 9 9 10 10 5 8 9 9 9 11 2 2 2 3 4 11 6 7 8 8 8 9 9 9 12 1 1 2 2 2 3 4 4 12 6 6 6 6 6 9 9 13 0 2 3 3 4 13 9 9 14 0 2 4 14 5 5 7 8 15 15 5 9

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