This is
MatrixForm[
{{1., 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
{1, 1.5, 1.5, 1.5, 2, 2, 2.2, 2.4, 2.5, 2.5, 2.8, 2.8, 3, 3, 3.2, 3.3}}]
$X^t$ and this
MatrixForm[
{{101.4, 117.4, 117.1, 106.2, 131.9, 146.9, 146.8, 133.9, 111.3, 123, 125.1, 145.2, 134.3, 144.5, 143.7, 146.9}}]
$Y^t$,
I tried [x*Transpose[x]]
but Mathematica does nothing, does not gives the 2x2 matrix.
At first I tried to indicate the complete $(X^tX)^{-1}X^tY$ but returned a really big output, I didn't understand fully so I tried first by parts.
Could someone please help?
MatrixForm
. It is a wrapper only meant for display. $\endgroup$