STAT 101 Lecture Notes - Lecture 6: Exploratory Data Analysis, Confounding, Survey Sampling
14 Jun 2017
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Document Summary
Stat 101 - lecture 6 - producing data. Material in week 6 corresponds to chapters 9/10/11. Begins transition from exploratory data analysis to statistical inference. Give data, what can we learn about the population from which the data arose? . Experimentation - scientific approach where we attempt to determine whether treatment has effect on response variable. Is trusted counterpart to learning about world through anecdotal evidence. Particularly relevant to survey sampling & experimentation in social sciences where human subjects involved. Understand distinction b/w observational study & experiment in terms of how data collected. Understand often difficult to carry out experiment to investigate topic of interest. Observational studies - effect of variable of interest in response variable may be confounded w/ third variable. Makes it impossible to determine whether it was variable of interest/third variable associated w/ response variable. In experiment, interested how factors/explanatory variables affect response variable. Factors applied to subjects & response measured.
