Suppose you have m = 28m=28 training examples with n = 4n=4 features (excluding the additional all-ones feature for the intercept term, which you should add). The normal equation is \theta = (X^TX)^{-1}X^Tyθ=(X T
X) −1
X T
y. For the given values of mm and nn, what are the dimensions of \thetaθ, XX, and yy in this equation?
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- X is 28×5,yis 28×1 teta is 5×1
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