In modern disciplines, large amounts of data are generated every day. Universities record student results, companies track sales, websites log user activity, and hospitals collect patient measurements. Data by itself does not provide understanding. The challenge is to analyze this data and extract useful information.
Statistics is the discipline that provides systematic methods to analyze data and make decisions when outcomes are uncertain.
Statistics is a field of study concerned with:
A practical definition is:
Statistics is the science of learning about a population using information obtained from a sample.
This definition introduces two central ideas:
These concepts form the foundation of the entire course.