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please explain SAT scores: A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to

please explain

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SAT scores: A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to be 450. Assume the population standard deviation is o = 112. Part: 0 / 4 Part 1 of 4 (a) Construct a 90% confidence interval for the mean mathematics SAT score for the entering freshman class. Round the answer to the nearest whole number. A 90% confidence interval for the mean mathematics SAT score is

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