it is a z test n it is one tailed i.e., left tailed
My problem is I have 2 sets of data, one is fees of clients that signed for our services and the other is fees for those who turned down our services. They are not even sets of data. About 650 signed and 850 did not.
I just needed help on what analysis to run to see if there is some correlation between the two. I believe it is a T or Z test, but I do not know which one it is and if it is one tailed or two. Any insight you may have would be grateful.