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A sample of 100 employees from a company had their annual sales recorded. The results gave a mean salary of $19,500. From past experiences, it

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A sample of 100 employees from a company had their annual sales recorded. The results gave a mean salary of $19,500. From past experiences, it is known that the standard deviation of mean salaries is $2,500. Construct a 95% confidence interval for the true average salary of all employees

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