Statistics help

Question

On a nationally standardized test with a mean of 80 and a standard deviation of 10, a student achieves a score of 85. What is the corresponding z-score?

Answer 1

Hello Dominique,

To calculate a z-score you subtract the mean from the data point you need to examine and divide it by the standard deviation.

Therefore:

z = x - u

------

sd

With the information provided in your problem the following applies:

z = 85 - 80

---------

10

z = .5000

I hope this assists you and that you have a great weekend. If I can be of further assistance, please do not hesitate to reach out to me or any tutor. Best!