Chapter 4: Central Tendency and Variability

Central Tendency

1. Arithmetic Mean

A. Definition

B. Properties

C. Overall mean

2. Median

A. Definition

B. Computation

C. Properties

3. Mode

A. Definition

B. Computation

C. Properties

4. When to use what?

Variability

1. Range

2. Standard Deviation

A. Deviation equation

a. Population

b. Sample

B. Raw score equation

a. Population

b. sample

C. Properties

3. Variance

Statistics