The Hartley-Davis motorcycle dealer in the Minneapolis St. Paul area wants to be able to forecast accurately

Question:

The Hartley-Davis motorcycle in the Minneapolis– St. Paul area wants to be able to forecast accurately the demand for the Roadhog Super motorcycle during the next month. From sales records, the has accumulated the data in the following table for the past year.
Month Motorcycle Sales
January .............9
February ..............7
March .............10
April ..............8
May ...............7
June ................12
July ................10
August ..............11
September ............12
October .............10
November ............14
December ............16
a. Compute a three-month moving average forecast of demand for April through January (of the next year).
b. Compute a five-month moving average forecast for June through January.
c. Compare the two forecasts computed in parts (a) and (b) using MAD. Which one should the use for January of the next year?

Dealer
A dealer in the securities market is an individual or firm who stands ready and willing to buy a security for its own account (at its bid price) or sell from its own account (at its ask price). A dealer seeks to profit from the spread between the...