A study by the department of education of a certain state was trying to determine the mean
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Question:
A study by the department of education of a certain state was trying to determine the mean SAT scores of the graduating high school seniors. The study examined the scores of a random sample of 84 graduating seniors and found the mean score to be 447 with a standard deviation of 111. At the 95% confidence level, use the normal distribution/emperical rule to estimate the margin of error for the mean, rounding to the nearest tenth.
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