The mean of a test is 600 and the standard deviation is 200. It is normally distributed.
1.Joe got a z-score of +0.4. What is his test score?
2.Amy is in the 55th percentile rank. What is a possible score for her?
3.What proportion of people scored between 440 and 530?
4.What proportion of people did better than 656?
5.Zoe has a score of 768. What percentile rank is she in?
6. What is the IQR for the test?