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Help Two thousand students took an exam. The scores on the exam have an approximate normal distribution with a mean u = 70 points and

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Two thousand students took an exam. The scores on the exam have an approximate normal distribution with a mean u = 70 points and standard deviation o = 12 points. Round your answers to one decimal place. (a) Calculate the first- and third-quartile scores for this exam. Q1 = Number points Q3 Number points (b) The middle 50% of the exam scores are between what two values? Enter your answers in increasing order. The middle 50% of the exam scores are between Number points and Number points. Find the probability P (-1.1

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