Model 1

Diagnostic tests

Test statistic

Serial correlation

F = 0.0429 (0.838)

Normality test

χ2 (Chi-square) = 3.372 (0.185)

Heteroscedasticity

F = 0.962 (0.531)

Model 2

Serial correlation

F = 0.0619 (0.415)

Normality test

χ2 (Chi-square) = 5.087 (0.335)

Heteroscedasticity

F = 0.931 (0.510)