This document provides an overview of business statistics. It defines statistics as a branch of mathematics that deals with collecting, organizing, analyzing, and interpreting numerical data to make effective inferences. Statistics can be descriptive, summarizing data, or inferential, using samples to estimate characteristics of populations. The key types of data are primary, collected directly, and secondary, already existing data collected by others. Data is classified and can be presented in tables, diagrams, and graphs for analysis using measures of central tendency, dispersion, skewness, kurtosis, correlation, regression, and multivariate techniques. Inferential statistics helps estimate population parameters from sample statistics and test hypotheses.