"does using the following expression give you bias ?
z = sqrt(r^2 - x^2 - y^2), where x, y are random numbers between [-1, 1].
I just check it with excel with 2 dimension and it seems unioform deviates."
"There are lots of articles regarding big data, data science and data analytics.But most of them does not define what the data science is and what is data scientist.Dr. Vincent has tried to define it so far."