What is Statistics?

Statistics is the science of collecting, analyzing, interpreting, and presenting data. This guide explains central tendency, variability, and how statistics helps us make sense of information.

Measures of Central Tendency

Mean: Average (sum ÷ count)

Median: Middle value when ordered

Mode: Most frequent value

Measures of Variability

Range: Difference between max and min

Variance: Average squared deviation from mean

Standard Deviation: Square root of variance, measures spread