About statistics lect. 4.1

• Statistics


  The study of methods that collect, organize, present, and interpret data to make decisions
• Descriptive Statistics


  • Concerned with describing the characteristics and properties of a group
• Inferential Statistics


  • Used to draw inferences about the properties or characteristics of a large group based on a sample
• Population


  A collection or set of individuals, objects, or events whose properties are to be analyzed
• Sample


  A subset of the population
• Variable


  A characteristic about each member of a population that is likely to change
• Constant


  A parameter that does not change
• Data


  A collection of facts such as numbers, words, observations, or measurements
• Parameter


  A characteristic about the population
• Statistic


  Data gathered about a sample