Statistical Sciences 1024A/B Lecture Notes - Lecture 1: Social Desirability Bias, Standard Deviation, Statistical Parameter
19 Oct 2016
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Document Summary
Statistics, the science of data, provides ideas and tools that can use in many settings. Statistical designs for choosing samples are the topic of this chapter. The population in a statistical study is the entire group of individuals about which we want information. A sample is a part of the population from which we actually collect information: we use a sample to draw conclusions about the entire population. A sampling design describes exactly how to choose a sample from the population. Choosing a representative sample from a large and varied population is not so easy. The rst step in planning a sample survey is to say exactly what population we want to describe. The second step is to say exactly what we want to measure, that is, to give exact de nitions of our variables. The nal step in planning a sample survey is the sampling design. The easiest but not the best design just chooses individuals close at hand.
