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

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5) 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 of getting a grade above 81 on this exam? ( 3 marks) b) What is the probability that a student scored between 65 and 89 ? (5 marks) c) What is the probability of getting a grade below 91 on this exam? ( 2 marks)

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