Please answer question b:Problem $3-21$

Two different forecasting techniques $($F$1$ and F$2)$ were used to forecsat demand for cases of bottied water. Actusl demsid snd the two

sets of forecssts sre as fallows:

a$.$ Compute MAD for esch set of forecssts. Gven your results, which forecast appesis to be more sccurste? $($Round your answers to $2$

decimal place.$)$

MAD F$1$

MaD F$2$

sppesrs to be more sccurste.

b$.$ Compute the MSE for esch set of forecssts. Given your regults, which farecast appears to be more sccurste? $($Round your anawers

to $2$ decimal places.$)$

NE F$1$

NGE F$2$

sppears to be more accurste.

c$.$ In practice, eitherMAD or MSE would be employed to compute forecsst errors. What factors might lesel a mansger to choose one

rether thon the other?

Either one might slesdy be in use, fomilar to users, and have past volues for campariaan if cantral charta $O$ are used, MSE would

be notursi; if

are used, MAD would be more natursl.

d$.$ Compute MAPE for esch dats set. Which forecsst appears to be mare accurete? $($Round your Intermediate calculations to $2$

decimal places and and final answers to $2$ decimal places.$)$

MANE F$1$

MAPE F$2$

sppesrs to be more accurste.