Let u_t be the residual variable values obtained from a simple regression model u_t : -1 -0.6 0.5 1 0.8 -0.9 1 -1 0,6 0,3

Verify the hypothesis of homoscedasticity for the residual variable based on a Fisher test. The values of u_t are ordered based on the ascending values of X_t and ,,critical F`` F_crit =5.05

Need Explanation.