Question

What is a z score? Why are standard scores important? What do they allow researchers/educators to do?

Answer 1

A Z score is a number of standard deviations from the mean a data point is. It is a measure of how many standard deviation below or above a population mean a raw score is.

The standard deviation is a very useful in statistics because it allows us to calculate the probability of a score occuring within our normal distribution and enables us to compare two scores that are from different normal distribution.

It allows researcher/educators to compare two scores that are from different normal distribution.

Hope this will help you. Thank you :)