7. Scores on an IQ test are normally distributed with a mean of 120 and a standard deviation of 15. What is the z-score for an IQ of 135? 8. Scores on recent math test, grades were normally distributed with a mean of 85 and a standard deviation of 5. What percentage of students scored above a 95? 9. Scores on a quiz are normally distributed with a mean of 75 and a standard deviation of 15. To help identify students who need extra help, we need to know which students who are in the bottom 10% of the class. What quiz grade will mark the students who need extra support? 10. Explain the Law of Large Numbers