If the demand for a product was 16, 28, 20 and 24 units in four consecutive months, and the corresponding forecasts in those four months were 20, 16, 20 and 30 units respectively, what is the MAD at the end of four months

5.5 units

Explanation:

Period   Actual     Forecast   Absolute deviation

   1            16              20                     4

  2            28              16                    12  

  3            20              20                    0

  4            24              30                    6

Total                                                   22

Mean absolute deviation(MAD) = Sum of absolute deviation / Number of periods

Mean absolute deviation(MAD) = 22 / 4

Mean absolute deviation(MAD) = 5.5 units

answer; /// i do believe that the correct answer is ; ///claude garamond;

there was no passage listed but using the process of elimination i'd say it was d. the high economy would do the opposite. i don't see how low prices would affect it. high unemployment is possible but i feel d is the better answer.