A New View of
Statistics by Hopkins
presents a good overview of basic concepts.
statistics - another online textbook that covers basic content.
If you prefer to go directly to the first section and proceed from there, click here. If
you have a more sophisticated interest in statistics, you might be interested
in the HyperStat
Online Textbook index.
measures of central tendency (central location) and measures of variation.
data and ways to summarize them
information on summarizing data
Reliability and Validity
Population and Sample - introduction, connect, apply, reflect, extend
Scales of Measurement