Hello
I am having problems while running the runs test in levels, since the number of runs (R)
in the variable 'c_cemento'is always equal to 1 and therefore the p value is
always very low thus rejecting the null hypothesis of randomness.
This problem does not appear when the test is run over the first-difference series.
Thanks and best regards
Ana J.López
anaj(a)uniovi.es