Gunarathna, I.G.I.S.C.; Nandani, E.J.K.P.
(Faculty of Scince, University of Ruhuna, Sri Lanka, 2020-01-22)
Forecasting is the prediction of values of a variable based on known past
values of that variable or other related variables. Forecasts also may be based
on expert judgments which in turn are based on historical data ...