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Approximate the distribution of grades

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A large group of students took a test in Physics and the final grades have a mean of 70 and a standard deviation of 10. If we can approximate the distribution of these grades by a normal distribution, what percent of the students

a) Scored higher than 80?

b) Should pass the test (grades ≥ 60)?

c) Should fail the test (grades & 65)?

d) You can find the answers to part a with the normal distribution and by using the Empirical rule. Find the answers to part a and b by the method you did not use already and compare answers.

Reference no: EM132855941

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