Does anyone know why there is a difference between the "Calculate Std()" in Fox, and the STDev() function in Excel?

They both produce different answers. For example, using the values:
4,5,4,6,3,5,6,4 in Fox produces a standard devation of 1.73.

Using Excel produces 1.06.

I tried doing the math by hand and the Excel one seems to be correct.

Should I not be using the Fox answer? I would really not have to program a std deviation function, but I will if I have to.

Does anyone know why the two are different?

Greg