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Show that in simple linear regression, provided (X?X)?1(X?X)?1 exists. Show that (X'Xr' = in simple linear regression. provided (X194 exists. | HI HR: H r?

Show that in simple linear regression, provided (X?X)?1(X?X)?1 exists.

Show that (X'Xr' = in simple linear regression. provided (X194 exists. | HI HR\": H r?\

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