Quiz_regression - Quiz a b c d Quiz 1 Which plot checks for...

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Quiz! a b c d
Quiz! 1- Which plot checks for normality?
2- Which pot checks for homo-skedasticity
3- Which plot checks for Independence
Quiz! Normality of residuals – no patterns, dots close to the line. Homoscedasticity – range of residuals constant over range of fitted values. Linearity – no “U” or “N” shape to residuals vs. fits Independence (order) – no pattern (increasing/decreasing, changing variance)
Regression Analysis: Selling price ($ versus Area (sq ft, tho, NumBed, NumBaths Analysis of Variance Source DF Adj SS Adj MS F-Value P-Value Regression 3 88556.8 29518.9 118.15 0.000 Area (sq ft, thousands) 1 18781.1 18781.1 75.17 0.000 NumBed 1 93.4 93.4 0.37 0.544 NumBaths 1 1239.6 1239.6 4.96 0.031 Error 41 10243.7

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