$(33$ points total $-2$ or $3$ pts each$)$

$6.$ Multiple choice$/$Short answer $($show your answer clearly$)$:

For the first $3$ questions, consider the forecast and actual demand shown below for the past $5$ weeks.

$\backslash$table$[[$Week$,$Demand,Forecast$],[1,80,84],[2,85,87],[3,85,85],[4,90,88],[5,94,90]]$

$6\mathrm{.}1(3$ pts$.)$ What is the MAD for the forecast?

a$)0$

b$)2\mathrm{.}4$

c$)3$

d$)4\mathrm{.}6$

e$)$ none of the above.

$6\mathrm{.}2(3$ pts$.)$ What is the mean squared error $($MSE$)$ for the forecast?

a$)21\mathrm{.}16$

b$)8$

c$)10$

d$)40$

e$)$ none of the above.

$6\mathrm{.}3(3$ pts$.)$ In which range is the MAPE for the forecast?

a

b$)2\mathrm{.}0-3\mathrm{.}0\%$

c$)3\mathrm{.}0-3\mathrm{.}5\%$

d$)3\mathrm{.}5-10\%$

e$)>10\%.$

$6\mathrm{.}4(3$ pts$.)$ If you use a moving average forecast to forecast data with an upward trend, then the forecast will generally be

a$)$ too high

b$)$ too low

$6\mathrm{.}5(2$ pts$.)$ Qualitative forecasting approaches are best used

a$)$ when there is a large amount of data and time available to make the forecast.

b$)$ when there is little data or time available to make the forecast.

$6\mathrm{.}6(3$ pts$.)$ At a walk$-$in medical clinic, the time between customer arrivals averages $30$ seconds. On average, a customer spends $4$ minutes at the center. What is the average arrival

$7$