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What is the probability that a student scored

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A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 73 and a standard deviation of 8.

a) What is the probability that a student scored below 91 on this exam?

b) What is the probability that a student scored between 65 and 89?

c) The probability is five percent that a student taking the test scores higher than what grade?

d) If the professor grades on a curve (i.e., gives As to the top ten percent of the class, regardless of the score), are you better off with a grade of 81 on this exam or a grade of 68 on a different exam, where the mean is 62 and the standard deviation is 3? Show your answer statistically and explain.

Reference no: EM132843849

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