1. You have a data set with four independent variables and n = 42 observations. If the model is to include an intercept, what would be the order of X’X? Of (X’X) −1 ? Of X’Y? Of P? 2. A data set with...

1. You have a data set with four independent variables and n = 42 observations. If the model is to include an intercept, what would be the order of X’X? Of (X’X)⁻¹? Of X’Y? Of P?

2. A data set with one independent variable and an intercept gave the following (X’X)⁻¹,

How many observations were there in the data set? Find ΣX²
_i. Find the corrected sum of squares for the independent variable.