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

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11. Scores on an MBA placement exam are reported to have a normal distribution with standard deviation 18. The exam officials stated that the average score for all students was 70. You take a random sample of 50 students and find their average score is 67. Use your data to estimate the mean score for all students taking the MBA placement exam. 1.536(18) . . 67: 67:41.99 6201,7139 W '- 1

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