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Suppose that the distribution of scores on an exam can be described by a normal curve with mean 100. 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 2 score is associated with an exam score of 130? (d) What percentile corresponds to an exam score of 140? o 0.15 0.3 2.5 13.5 34 50 68 85.5 97.5 99.7 99.85 000 C- 0 000 00 (e) Do you think there were many scores below 40? Explain. A score of 40 is standard deviations below the mean, and so the percentage of scores below 40 would be approximat \\/ "'SEIECt'" 0.15% 0.3% Need Help? 25% 13.5% 34% 50% \\a Show My Work (Optional) 0 68% 86.5% 97.5% Submit Answer Practice Another Version 99'7\