Summarizing Numerical Data

Concept Acquisition

1. Wilkinson’s Grammar of Graphic provides a unifying framework to describe a wide range of statistical graphics.
2. A plot can be decomposed into a series of layers that include the data, the aesthetic mappings, the geometry, and more.
3. Aesthetic mappings link the variability in a data variable to the variablity in an aesthetic / visual cue.
4. The geometry describes the manner in which the obserbations will be represented on the plot.
5. Facets allow for multiple subplots for subsets of the data.

Tool Acquisition

Concept Application

1. Describe a distribution in terms of shape, center, and spread