How to build graphs, charts and plots

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How to build graphs, charts and plots
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For Categorical data

• If the data is nominal, then
• Few values Pie Chart
• Many Values Pareto Chart (order of bars
  determined by frequency)

• If the data is ordinal, then
• Bar Graph (order of bars determined by order of
  the ranking variable)

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For Numerical Data

• Value classes are contiguous intervals that cover
  all possible data values

• Frequency counts can be made one class at a time
  (non-cumulative), or one more class every row
  (cumulative).
• Frequency counts can also be absolute or relative

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Graphs for numerical data
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Other graphs for numerical data

• Time Series plot
• Use the scatter plot graph type from Excels
  Chart wizard
• Stem-Leaf plot
• PhStat
• Descriptive Statistics
• Stem-Leaf Plot

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Other graphs for numerical data

• Run Chart
• Use the scatter plot graph type from Excels
  Chart wizard
• Box-Whisker plot (chapter 3)
• PhStat
• Descriptive Statistics
• Box-Whisker Plot

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Histogram and Polygons in PhStat

• To let PhStat graph frequency distributions of
  the data use the command sequence
• PhStat
• Descriptive Statistics
• Histogram Polygons

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Histogram and Polygons in PhStat

• Then, you input the proper cell ranges in the
  dialog box for the procedure
• Variable cell range range of cells for data.
• Bins cell range class limits for classifying
  data into tables.
• Midpoints cell range to then have PhStat plot
  histograms and polygon charts of your choosing.
• Lets draw the frequency distribution charts for
  2.12 using PhStat in Excel during class