Graphing Qualitative and Quantitative Data

• Quantitative - data that has to do with numbers
• Qualitative - data that has to do with categories
• Univariate - data with only one variable
• Bivariate - data with two variables
• Bar graph - Shows the distribution of measurements among categories, with the height (or length) of the bar measuring how often a particular category was observed.
• Pie chart - Shows how the measurements are distributed among the categories.

  -compare parts of a whole
• Line graph - Shows trends over time

  - Can use more than one on the same graph to compare data sets

  - Good for small amounts of data
• Dot plot - Counts how many times data occurs (frequency)

  - Good for small amounts of data
• Histogram - Counts how many times data occurs between set ranges

  - Good for large amounts of data
• Stem leaf - simple way to present the distribution of quantitative data using the actual numerical values