i need to know how to interpret the results of Eviews using the granger causaulity test
my results as follows:Pairwise Granger Causality Tests
Date: 04/01/12 Time: 06:13
Sample: 1991 2011
Lags: 3


Null Hypothesis: Obs F-Statistic Prob.


GDP does not Granger Cause PS 17 0.93934 0.4576
PS does not Granger Cause GDP 0.58390 0.6390

and do ineed to make ADF first or it is done automatically
please help me