4. The SAT has a mean score of 1498 and a standard deviation of 199. (6 points each) a. What is the z-score of 1840? b. What score represents the 80th percentile of the distribution? Round your answer to the nearest 10 points. c. If a school wants to admit only students with the top 10% of SAT scorers, what cut-off score is needed? Round your answer to the nearest 10 points. d. The mean score on the ACT is 21 with a standard deviation of 5.2. Which student scored higher: Abby with a score of 31 on the ACT, or Barbara with a score of 2130 on the SAT? I 5. For each of the following variables, determine i) is the variable qualitative or quantitative? ii)