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A random sample of 40 students has a mean annual earnings of $3120 and a...

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A random sample of 40 students has a mean annual earnings of $3120 and a population standard deviation of $677. Use this sample data to construct a 95% confidence interval for the population mean, ?, of all student earnings. ($2910, $3330)($1987, $2346)($4812, $5342)($210, $110)

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