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stats 119 A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test.

stats 119

A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test. What is the 90% confidence interval for the mean score, u, of all students taking the test? O A. 28.4

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