Question$-2$:

The same company decided to improve the forecasting technique. Usually, they use exponential smoothing method using smoothing constant $0\mathrm{.}3.$ However, they would like to try an alternate option choosing smoothing constant $0\mathrm{.}4.$ Which smoothing constant will provide more accuracy? Justify your answer by calculating MAPE. Consider the forecast for year$2019$ using Na$$ve approach.

Year Total sale

$2018,7,00,000$

$2019,9,00,000$

$202012,00,000$

$2021,8,00,000$

$202210,00,000$