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[Steps Shown] A standard placement test has a mean of 115 and a standard deviation of  = 10. Determine the minimum sample size if we want to be 95% certain

Question: A standard placement test has a mean of 115 and a standard deviation of  = 10. Determine the minimum sample size if we want to be 95% certain that we are within 3 points of the true mean. (References: example 6 page 316, end of section exercises 58 - 62 pages 321 - 322) (5 points)

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[Steps Shown] A standard placement test has a mean of 115 and a standard deviation of  = 10. Determine the minimum sample size if we want to be 95% certain

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