If a student receives a z score of 0, how well did that student do in comparison with other students in the group? One test has a mean of 100 and a standard deviation of 15. What percentage of...

If a student receives a z score of 0, how well did that student do in comparison with other students in the group?

One test has a mean of 100 and a standard deviation of 15. What percentage of children would have a test score of 115 or more when given this test?