Task Three- Forecasting

Suppose that you have gathered sales data of a retail company from 2016-2022 in different quarters. You are going to consider the company sales value and to forecast the company amount of sales in 2023 in different quarters. Look at the gathered data of previous years related to the amount of sales in each quarter which have been reported in Table 2.

7.Calculate the Error, mean absolute percentage error (MAPE), Mean Square Error (MSE) and Mean

Absolute Deviation (MAD).

Table 2- Data of amount of sales among previous years Table 2- Data of amount of sales among previous years