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# Tip Average

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At the time Beth was hired as a server at a Restaurant, she was told she could average \$20 a day in tips. Over the first 35 days she was employed at the restaurant, the mean daily amount of her tips was \$24.85 with a standard deviation of \$3.24. At the .01 significance level, can Beth conclude that she is earning an average of more than \$20 in tip?

https://brainmass.com/statistics/descriptive-statistics/tip-average-8014

#### Solution Preview

T Value = (Test Value - Mean)/(Standard Deviation)
<br> = (20 - 24.85)/(3.24) = -1.4969
<br>
<br>From the t-table, the T critical ...

#### Solution Summary

At the time Beth was hired as a server at a Restaurant, she was told she could average \$20 a day in tips. Over the first 35 days she was employed at the restaurant, the mean daily amount of her tips was \$24.85 with a standard deviation of \$3.24. At the .01 significance level, can Beth conclude that she is earning an average of more than \$20 in tip?

\$2.49