Problema Solution
A teacher finds that the test scores of a group of 40 students have a mean of 75 and a standard deviation of 10. If Anne has a test score of 88, what is Anne’s z-score?
Answer provided by our tutors
The Z score is the deviance divided by the standard deviation. In this case, that would be (88 - 75) / 10 = 13/10 = +1.3