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simple: single regressor variable in model
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linear: linear dependence between response variable and regressor variable
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model is y = b0 + b1x + e
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y -> measured response variable
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x -> regressor variable
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b0 -> intercept in the regression model
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b1 -> slope of the regression line
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e -> error term
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generally, yi = b0 + b1xi + ei
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(x1, y1), (x2, y2), ................., (xn, yn) -> experimental pairs of observations
- centered model is given as