There are usually three basic measures of central tendency:

1. Mathematic Average

·         Arithmetic Mean

·         Geometric Mean

·         Harmonic Mean

2. Average of Position: Mean exhibit by position is called Average position

·         Median

·         Mode

3. Measures of Position Values: It is measures of Location.

·         Quartiles

·         Quintiles

·         Deciles

·         Percentile