Posted by Alica on .
In a normal distribution, what zscore value separates the highest 90% of the scores from the rest of the distribution?
a)z = 1.28
b)z = 1.28
c)z = 0.13
d)z = 0.13

Statistics 250 
PsyDAG,
Look up the Z scores in the back of your stat text labeled something like "areas under the normal distribution." That should give you the answer.