A teacher graded the tests for each of her students. She calculated a mean grade of 80 and a standard deviation of 3. One of her students, Katrina, had a z-score of 2. What grade did Katrina get on the test?

Question

A teacher graded the tests for each of her students.  She calculated a mean grade of 80 and a standard deviation of 3.  One of her students, Katrina, had a z-score of 2.  What grade did Katrina get on the test?

Steve · Answer

Z=2 means 2 std above the mean. So, what's 80+2*3?

Jacob · Answer

86

Ms. Sue · Answer

Try reading Steve's problem again, Jacob.