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?

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?

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