Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distrib

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Scores On A 100 Point Final Exam Administered To All Applied Calculus Classes At A Large University Are Normally Distrib 1 (20.36 KiB) Viewed 41 times

Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distributed with a mean of 72.7 and a standard deviation of 7.9. (a) What percentage of students taking the test had scores between 60 and 80? (Round your answer to two decimal places.) % (b) What is the probability that a randomly chosen student earned an "A" (90 or above) on the test? (Round your answer to 4 decimal places.) (c) At what score was the rate of change of the probability density function for the scores a maximum? (d) According to the Empirical Rule, approximately what percentage of scores were above 80.67 (e) According to the Empirical Rule, the lowest 2.5% of the scores were below