Statistical Sciences 2244A/B Lecture Notes - Lecture 1: Simple Random Sample
15 Sep 2016
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Document Summary
Sample - the part of population from which we actually collect information. We use this to draw conclusions about the entire population. To obtain a proper sample design, find exactly what population we want to describe and what we want to measure. o. Not all stat studies use samples that are drawn directly from the entire population of interest. Experiments use samples from an entire population of interest. Experiment cannot always be extended to the whole intended population. Statistical interference: process of drawing conclusions about a population on the basis of sample data. o. Infer information about polulation from what is known about the sample. Sampling design: describes how exactly to choose a sample from the population. Convenience sample: sampling design that chooses individuals close at hand. Bias: result when the design for stat studies favours certain outcomes. Voluntary response sample: lets individuals choose whether to participate or not.
