Diagnosis
The T test allows you to determine the significance of the connectionbetween the dependent variable and an independent variable. Thecalculated value, which is determined using the regression coefficientand its standard deviation, is compared with theoretical values. Formore precise details, consult statistics textbooks.
To confirm the results of the calculation, the significance of the Ttest should be greater than or equal to 0.95 (95%).

Procedure
If the significance of the T test is under 0.95 (95%), remove thisvariable and perform the linear regression again.