STAT 101 Lecture 1: Chapter One- What is Statistics
3 Sep 2016
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Document Summary
Data- collection of numbers, characters, images, or other items that provide information. Context- tells who and what was measured, how the data were collected, where the data were collected, and when and why the study was performed. Case- an individual about who we have data. Experimental unit- an individual study for which or for whom data values are recorded. Record- information about the individual in a database. Sample- a subset of population, examined in hope of learning about the population. Population- the entire group of individuals about whom we hope to learn. Variable- information about the same characteristic for many cases. Categorical variable- names the categories with words or numbers. Identifier variable- categorical variable that records a unique value for each case, used to name or identify it. Quantitative variable- variable in which the numbers are values of measured quantities. Ordinal variable- variable whose categorical values possess some kind of order. Rows of the data table represent the who.
