Scenario 7 -Calculate the MAD for This Scenario

Scenario 7.3
The Entrepreneurship professor had a habit of oversupplying extra credit opportunities for his class each semester and his colleagues delighted in trying to forecast his class enrollment from one semester to the next.The forecasts for one colleague,along with the actual class enrollment,appear in the table.
$$\begin{array} { | c | c | c | } \hline \text { Period } & \text { Actual } & \text { Forecast } \\\hline 1 & 173 & 166.7 \\\hline 2 & 177 & 183 \\\hline 3 & 180 & 174.7 \\\hline 4 & 151 & 163.2 \\\hline 5 & 168 & 155.6 \\\hline 6 & 184 & 187.6 \\\hline 7 & 198 & 192.9 \\\hline 8 & 191 & 194.6 \\\hline 9 & 167 & 149.8 \\\hline 10 & 177 & 195.2 \\\hline\end{array}$$
-Calculate the MAD for this scenario.

A) 10.04
B) 8.99
C) 10.40
D) 9.25