I am testing the lead-lag relationship among two variables with cross-correlation function (CCF) by SPSS. however, SPSS computes CCF coeficient for all defined lags, but it does not determine the p-value for them, how I can obtain the p-value of various lags?
For some variables that are not normally distributed, I used their ranked form in CCF, to simulate a kind of CCF with Spearman's method, in this case, how would it be possible to obtain p-value for each lag?