CONTENTS

Table of Contents
Introduction

1. Descriptive Statistics in Evaluation
2. Subgroup Analysis
3. Variable - Are They Related?
4. Correlation
5. The t-Test of Difference Between Means

Supplements
Resources
Glossary

Wading Through the Data Swamp:
Program Evaluation 201

Mathematical Symbols

The following mathematical symbols will be used throughout the module.

Symbol	Meaning
	Sum (result of adding)
	Square root
µ	Mean symbol
x	Variable
x2	x squared, or x times x
n	Number of people in the group (participants or comparison group)
	Summation of x
	Summation of x squared
	Mean of X
SS	Sum of squares
S2	Variance