Statistics, The study of procedures for collecting, describing, and drawing conclusions from information., Descriptive statistics , Methods for collecting, presenting, and describing information., Inferential Statistics, Methods that use summarized information to interpret data and draw conclusions or make decisions., Population, The complete collection of all individuals being studied., Sample, A subset of the population used to represent the whole., Variables, Characteristics we want to know about (e.g., age, hair color, height)., Data, All pieces of information collected for variables; plural of datum.,   Parameter, A data value that describes a characteristic of an entire population., Sampling, The process of selecting a sample from the population., Simple Random Sample (SRS), A sample where every combination of individuals has an equal chance of selection., Stratified Sample, Population is divided into homogeneous groups (strata), and an SRS is taken from each stratum., Cluster Sample, Entire clusters (groups) are selected at random; everyone in chosen clusters is sampled., Systematic Sample, Selecting every kth person from an ordered list after a random starting point., Convenience Sample , A sample made by choosing individuals who are easiest to reach; prone to bias..

Stat chapter 1

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