Statistics
Statistics are a set of mathematical techniques to analyze numerical, categorical, and ordinal data to produce information, especially for the purpose of inferring proportions in a whole from those in a representative sample.
Statistics Resources
Deeper Knowledge on Statistics

Statistical data types
Types of data used in statistics: Numerical/quantitative, categorical/qualitative, and ordinal

Averages: Measures of Central Tendency
Usage and calculations for mean, median, and mode on a set of numbers

Dispersions: Measures of Spread
Usage and calculations for range, standard deviation, and variance on a set of numbers

Data Science
The scientific method applied to data analysis

Data Analysis
The transformation of data to information

Statistical Hypothesis Testing
The art and science of stimulating demand

Standard Deviation
How to define, find, and use the standard deviation
Broader Topics Related to Statistics

Data Analysis
The transformation of data to information

Math
Fun with numbers