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A union of restaurant and food service workers would like to estimate this year's mean hourly wage, u, of food service workers in the U.S. Last year's mean hourly wage

was $8.16, and there is reason to believe that this year's value is different from last year's.The union decides to do a statistical test to see if the value has indeed changed. The union chooses a random sample of this year's wages, computes the mean of the sample to be $7.79, and computes the standard deviation of the sample to be $1.10.

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