periods 13-26, where
\alpha =0.6
and
\gamma =0.9
. Then find the MAD for periods
13-24
.
Use the Holt-Winters multiplicative seasonality model with no trend to find the forecast for periods 13-18, periods 19-24, and then for periods 25 and 26. (Type integers or decimals rounded to two decimal places as needed.)
\table[[Period,Forecast],[13,-],[14,-],[15,-],[16,
?