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A simple random sample of 25 seniors from a large metropolitan area school district had a mean Math SAT score of 450 (sample mean).

A simple random sample of 25 seniors from a large metropolitan area school district had a mean Math SAT score of 450 (sample mean). Suppose we know that the standard deviation of the population of Math SAT scores for seniors in the district is 100 (sigma). A 90% confidence interval for the mean Math SAT score mu for the population of seniors is what? (Assume the population of Math SAT scores for seniors in the district is approximately normally distributed

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