. Question 18 v In this problem, we explore the topic of percentiles as related to the Normal Distribution. For example, suppose that scores on an exam are normally distributed, with a mean of 56 and a standard deviation of 7. a. What is the percentile of a score of 57.4 points? Round to one decimal. This will require the normalodf command. .38 35 4'2 49 56 63 .70 F? 84 Exam Score Remember that the percentile of a score of 57.4 is simply the percentage of scores that were 57.4 points or lower. This can be viewed as a probability problem. We want the red shaded area in the graph above, expressed as a percent. So we simply find the probability P[X