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A restaurant manager wants to know if average waitstaff wages exceed $15 an hour. A random...

A restaurant manager wants to know if average waitstaff wages exceed $15 an hour. A random sample of 18 hourly wages for waitresses (including tips) was drawn from a normal population. The sample mean and sample standard deviation were computed as= $15.90 and s = $2.50. Test the null and alternative hypothesis at both the 5% and 10% level.

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There is enough evidence to support the claim that average waitstaff wages exceed $15

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