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QUESTION
A random sample of 10 waiters revealed the following hourly earnings, including tips: $19, $18, $15, $16, $18, $17, $16, $18, $20, and $14.
A random sample of 10 waiters revealed the following hourly earnings, including tips: $19, $18, $15, $16, $18, $17, $16, $18, $20, and $14. If the hourly earnings are normally distributed with a standard deviation of $4.50, estimate with 95% confidence the mean hourly earnings for all waiters.
