Central Tendency Essentials

Front

Mean

Back

Average of all data points

Front

Median

Back

Middle value in ordered data

Front

Mode

Back

Most frequently occurring value

Front

Range

Back

Difference between max and min

Front

Variance

Back

Measure of data spread

Front

Standard Deviation

Back

Square root of variance

Front

Quartiles

Back

Divide data into four parts

Front

Interquartile Range

Back

Difference between Q3 and Q1

Front

Outliers

Back

Data points far from others

Front

Skewness

Back

Measure of data asymmetry