Youtube BY Maps Suppose that the distribution of scores on an exam can be described by a normal curve with mean 110. The 16th percentile of this distribution is 80. (Use the Empirical Rule.) (a) What is the 84th percentile? (b) What is the approximate value of the standard deviation of exam scores? (c) What z score is associated with an exam score of 65? (d) What percentile corresponds to an exam score of 50? O 0.15 O 0.3 O 2.5 O 13.5 O 34 50 O 68 O 86.5 O 97.5 99.7 O 99.85 (e) Do you think there were many scores below 207 Explain. A score of 20 Is standard deviations below the mean, and so the percentage of scores below 20 would be approximately -Select- Need Help? Read It