STAT 100 Chapter 1: Stats 100 Chapter 1 Where Do Data Come From.docx

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STAT 100 Full Course Notes
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STAT 100 Full Course Notes
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Statistics: science of data; the art of data , a big part of good judgement lies in deciding what you must measure in order to produce data that will shed light on your concerns. Individuals: objects described by a set of data, may be people, but also animals or things. Variable: any characteristic of an individual, can take different values for different individuals. Categorical variables: places an individual into one of several groups or categories, to do statistics with these variables, we use counts or percentages, eg. Statistics deals with numbers, but not all variables are numerical. Bad judgement in choosing variables can lead to data that cost lots of time and money but don"t shed light on the world. Here are some examples of the challenges in deciding what data to collect. You can observe a lot by watching. yogi berra, former catcher and manager of ny yankees. It helps if the watcher knows what to look for.

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