STATS 2B03 Chapter Notes - Chapter 1: Statistical Inference, Categorical Variable, Descriptive Statistics
22 Jun 2019
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Inferential statistics (chapter 7) consists of using a sample to draw conclusions about a population: when you make an inference, you want to know exactly where that population comes from. Thus, you cannot make some inference on a population. You must measure for how accurate it is using probability (chapter 4-6): a parameter is a measurement describing some characteristic of a population e. g. population: mac students, the average age of a mac student denoted by . This is a parameter: a statistic is a measurement describing some characteristic of a sample i. e. a parameter is something calculated of all the population. But, if you collect something from a sample and calculate it, then it is a statistic. This level of measurement is categorized by data that consists of names, labels, or categories only where the different categories can"t be ordered e. g. gender, eye color: another type of categorical data is called ordinal level of measurement.
