 Testing differences between p and π
 More than two categories
 Chi square test of independence
 Introduction
 Calculations
 Assumptions
 Reporting results
 Exercises
For a practical application of Chi Square in marketing see "Glimpses
into Application of ChiSquare Tests in Marketing" by P.K. Viswanathan.


Analysis
Tools
VassarStats
by Richard Lowry
Fisher's Exact Test
College of Saint Benedict  Saint John's University
Analysis
Lab
OnlineStatBook
Instructional Demos
Chi
Square Test of Deviations from Expected Frequencies
Rice Virtual Lab in Statistics
2x2
Contingency Tables
Rice Virtual Lab in Statistics
Text
Chi
Square Tutorial
by Jeff ConnorLinton
Chi Square
and tests of contingincy tables
by David Stockburger
Hypothesis
testing for categorical data, Inference
for contingency tables
by Keith Dear
The Chi Squared
tests
by T. D. V. Swinscow; revised by M. J. Campbell
Contingency
table: Chi Squared Test
by Will Hopkins of the University of Otago
Chi Square
by G. David Hopkins
Tests
for categorical variables (PDF)
by Bruce Weaver
Chi Square Lesson
by Amar Patel
Chi Square Distribution
by Wikipedia

An
Introduction to Categorical Data Analysis (Wiley Series in Probability
and Statistics. Applied Probability and Statistics)
by Alan Agresti
Categorical
Data Analysis Using the SAS System
by Maura E. Stokes, Charles S. Davis, Gary G. Koch
Statistical
Methods for Categorical Data Analysis
by Daniel A. Powers, Yu Xie, Daniel A. Powerw, Dan L. Powers, Xu Xie
Fundamental
Statistics for the Behavioral Sciences with CDRom
by David Howell 