At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told “You can average $80 a day in tips.” Assume the population of daily tips is normally distributed with a standard deviation of $3.24. Over the first 35 days she was was employed at the restaurant, the mean daily amount of her tips was $84.85. At the .01 significance level, can Ms. Brigden conclude that her daily tips average more than $80?
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