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A study of 1000 teachers' salaries revealed a mean income of $85,000 and a standard deviation of $7,500. Use this informational to determine the mean
A study of 1000 teachers' salaries revealed a mean income of $85,000 and a standard deviation of $7,500. Use this informational to determine the mean income of all teachers, using the 95% confidence interval. Then calculate the mean of all teachers salaries using the 90% confidence interval
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