On a standard measure of hearing ability the mean is 300 and the standard deviation...
On a standard measure of hearing ability the mean is 300 and the standard deviation is 20. What is the z-score for a person who scores 310?
Answer & Explanation
You can find the z-score using the formula
Hence for x=310 ,u=300, sigma=20 we have that
Z score for someone with 310:
It is simply how many units of "20" the persion deviates from the mean "300". The person who scores 310 deviates two standard deviations of "20" from the mean.