I currently have two sets of input variables say, $X$ and $Y$ with one output variable $Z$. That is:
$$Z = a_0 + a_1X_1 + a_2X_2... + a_{11}X_{11} = b_0 + b_1Y_1 + b_2Y_2 + b_3Y_3 + b_4Y_4$$
I have the independent $X$ and $Y$ values but don't have the dependent variable $Z$ values.
Is there anyway that I can estimate coefficients $a$ and $b$ and also the value of R squared?