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# ch1_4pp - 22s:152 Applied Linear Regression In statistics...

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22s:152 Applied Linear Regression Chapter 1: Introduction ———————————————————— All disciplines use models: physics F=ma sociology socioeconomic mental status health marketing house price = f (square footage) 1 In statistics, we use data to fit models that include variability . Y = β 0 + β 1 x + error term 0 2 4 6 10 0 10 20 30 x y These fitted models can be used to test hypotheses, or test if relationships exist. 2 In many situations, the model considered is a “grossly” simplified description of a complex reality, for example...

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