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Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distributed with a mean of 74.7 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.) 71.75 % (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.) 0257 (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 82.6? 15.85 X% (e) According to the Empirical Rule, the lowest 2.5% of the scores were below

Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distributed with a mean of 74.7 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.) 71.75 % (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.) 0257 (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 82.6? 15.85 X% (e) According to the Empirical Rule, the lowest 2.5% of the scores were below

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distributed with a mean of 74.7 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.) 71.75 % (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.) 0257 (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 82.6? 15.85 X% (e) According to the Empirical Rule, the lowest 2.5% of the scores were below
Transcribed Image Text:Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distributed with a mean of 74.7 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.) 71.75 % (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.) 0257 (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 82.6? 15.85 X% (e) According to the Empirical Rule, the lowest 2.5% of the scores were below
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