Hadley Wickham
Rice University
Graphical inference
Visualisation is a critical part of any exploratory analysis, but how
can we be sure that we are not seeing patterns in randomness? In this
talk, I'll introduce the protocols of graphical inference that provide
formal statistical inference for visual findings. Graphical inference
uses much of the same infrastructure as classical hypothesis testing
but replaces the test statistic with a human observer and the null
distribution with null plots, visualisations of samples from the null
hypothesis. With some care, the line up protocol allows us produce
valid p-values for graphical findings, and provide an important tool
for the exploratory analyst.