STAT 095 Lecture Notes - Lecture 1: Confounding, Dependent And Independent Variables, Operational Definition
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Organizes, summarizes, communicates a group of numerical observations. Makes averaging results more efficient and less time consuming. Example: women"s weight increasing from 140. 2 pounds(1960) to 166. 2 (2010) in the. A sample is a set of observations drawn from the population of interest. Example: weights of both women and men were the samples taken to learn more about the entire us population in those times (population was the target interest) Answer: samples: used to make an inference about the general population. Variables: observations of physical, attitudinal, and behavioral traits that can take on different values. Examples: motivation, self-esteem (transform observations into numbers) Discrete and continuous numerical observations are used to quantify variables. Only specific values (whole numbers) no other values exist between these numbers. Example: 0-7 times a week; not 1. 6 or 5. 92 times a week Can take on a full range of values; even numbers out to several decimal places. Example: a person can complete a task in.
