QUESTION

1. 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 $9.95. Over the first 35 days she 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?

4. Refer to the Buena School District bus data.

a. Select the variable for the number of miles traveled last month. Conduct a test of

hypothesis to determine whether the mean number of miles traveled is equal to 840.

Use the .01 significance level. Find the p-value and explain what it means.

b. Using the maintenance cost variable, conduct a test of hypothesis to determine whether

the mean maintenance cost is less than $500 at the .05 significance level. Determine the

p-value and interpret the result.

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At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was

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