Hi!
Thanks for your reply!!
The numbers are : x1 = 1 145 063 ; x2= 610 447; n1= 165 285 036; n2= 161 882 398
I get a z-value of 390, therefore i understand that the p value must be very very close to 0. But is excel's algorithm made so that since the z value is so large, it will just show me...