STAT 2507 Lecture Notes - Lecture 1: Statistical Unit, Univariate, Descriptive Statistics
11 Sep 2018
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Document Summary
Descriptive statistics: science of summarizing and describing the important characteristics of a set of data. Inferential statistics: science of using information obtained from a sample to infer about the characteristics of a population of interest. Sample: subset of the population selected in some prescribed manner. Variable: characteristic that changes or varies over times or for different individuals or objects under consideration. Experimental unit: individual or object on which a variable is measured. Single measurement or data value is obtained when a variable is actually measured on an experimental unit. Univariate data: obtained when a single variable is measured on a single experimental unit. Bivariate data: obtained when two variables of measured on a single experimental unit. Multivariable data: obtained when more than two variables are measured. Qualitative (categorical): measure a quality or characteristic on each experimental unit, measurements of qualitative variables belong to one of several categories, examples, political affiliation: liberals, conservatives, ndp, green,
