Getting acquainted with your data

EYEBALL YOUR DATA
Put it in Excel
Sort it
Round it off
Tabulate it
Graph by frequency
Craph by time
X-Y scatter graph

PUT THE FACTS ON THE TABLE
Categories versus numbers
Frequency
Mean vs median (and mode)

DISPERSION
Ordinary Diversity vs. Outliers
Quartiles & Interquartile Range
Standard Deviation

OUTLIERS: individual versus group
Tukey test for Outlines
Problem, opportunity or glitch