Give some practical uses of knowing variation.docx

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Give some practical uses of knowing variation The video begins at the park, with cyclists and joggers going by. It shows a very slow old woman going by on a bike, and then a bunch of racing cyclists. The statistician points out that sometimes, what is interesting about a data set is not its average but how much it varies. He then discuss the weather in New York and San Francisco, which have pretty much the same average annual temperature, even though New York has hot summers and cold winters. The video ends with a practical application in medical research, where mean exposure to a toxin is far less interesting than the fact that a small number of individuals are exposed to very high levels. There is variation in all aspects of our lives. Household expenses, people’s behaviors, stress, weight
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