Question

True or false?!

The formula for a z-score is z= (x+u)/o , where x is the value, u is the mean, and o is the standard deviation.

Answer 1

false, the formula is actually

z = (x - mu)/sigma

since you're basically finding the distance from the mean...but you're scaling it by sigma (in a way) to see how far you are from the mean in terms of sigma

Answer 2

so if you had

z= (x-u)/o

then it would be true