Regression a)Compare the three models below: Model 1: train MSE = 0.423, test MSE = 0.978 Model 2: train MSE = 0.572, test MSE = 0.644 Model 3: train MSE = 0.218, test MSE = 1.103 Based on this information, which of these models generalises the

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
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Regression

a)Compare the three models below:


Model 1: train MSE = 0.423, test MSE = 0.978

Model 2: train MSE = 0.572, test MSE = 0.644

Model 3: train MSE = 0.218, test MSE = 1.103


Based on this information, which of these models generalises the worst to unseen data?

b)

When adding more variables to a linear model, what is true about the R-squared value?

c)

Adding more variables always leads to a lower test MSE.

False
True
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