Data Analysis The collected data are tested to confirm that they are good for use in developing the forecasting model, which is based on the multiple regression technique. The first test is the goodness-of-fit test for confirming that the data are non-parametric and distribution free. After that, the data are tested to confirm the basic assumptions of the multiple regression technique, using tests such as the (1) Normal Distribution Test, (2) Linearity Test, (3) Homogeneity of Variance Test, and (4) Multicollinearity Test.