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1 1. Scores on an MBA placement exam are reported to have a normal distribution with standard deviation 18. The exam ofcials stated that the

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1 1. Scores on an MBA placement exam are reported to have a normal distribution with standard deviation 18. The exam ofcials stated that the average score for all students was 70. You take a random sample of 50 students and nd their average score is 6'7. Use your data to estimate the mean score for all students taking the MBA placement exam

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