Question

A set of data items is normally distributed with a mean of 90 and a standard deviation of 4. Convert 83 to a z-score. Round your answer to the nearest hundredth as needed.

Answer 1

i'm trying to remember how to do this

is it ( 90- 83) / standard deviation ?

Answer 2

n0 - now i remember

its score - mean / std dev

so here it is

(83-90) / 4
= -7/4 or -1.75

Answer 3

thats it - i just checked some statistics notes