Consider the Following Partial Computer Output for a Multiple Regression

Essay

Consider the following partial computer output for a multiple regression model. $$\begin{array} { l c c } \text { Predictor } & \text { Coefficient } & \text { Standard Deviation } \\\text { Constant } & 41.225 & 6.380 \\\mathrm { X } _ { 1 } & 1.081 & 1.353 \\\mathrm { X } _ { 2 } & - 18.404 & 4.547\end{array}$$ Analysis of Variance $$\begin{array} { l r c } \text { Source } & \underline { \mathrm { DF } } & \underline { \mathrm { SS } } \\\text { Regression } & 2 & 2270.11 \\\text { Error (residual) } & 26 & 3585.75\end{array}$$
-What is the number of observations in the sample?