## Students Q and A

### question

by Nishat Tandra -
Number of replies: 2

What the importance  of Z-score

### Re: question

by alma akondo -

A Z-score, otherwise known as a standard score, is a transformation of a score (i.e., a continuous variable) so that it has a mean of 0 and a standard deviation of 1.

Its formula is:

Z=(X-Mean)/SD.

It is used, among other things, to compare two scores with different scales (that is, with different means and SDs)