2). Using the RestaurantTips data set which compares servers, tips, and credit card usage, we have the following two-way table. It shows the servers and whether or not the customer used a credit card to pay for their meal. (Hint: You'll have to total each column and row to calculate the proportions below) A B C Yes 21 15 15 No 39 50 17 a) Compute and interpret a 95% confidence interval for the proportion of bills paid with a credit card. (Statkey: Confidence Interval for Proportion) b) Compute and interpret 90% confidence intervals for the proportion of bills for each server. (Statkey: Confidence Interval for Proportion) c) From the confidence intervals in part b) does it appear that Server B is responsible for 1/3 of the bills this week?
2). Using the RestaurantTips data set which compares servers, tips, and credit card usage, we have the following two-way table. It shows the servers and whether or not the customer used a credit card to pay for their meal. (Hint: You'll have to total each column and row to calculate the proportions below)
A B C
Yes 21 15 15
No 39 50 17
a) Compute and interpret a 95% confidence interval for the proportion of bills paid with a credit card. (Statkey: Confidence Interval for Proportion)
b) Compute and interpret 90% confidence intervals for the proportion of bills for each server. (Statkey: Confidence Interval for Proportion)
c) From the confidence intervals in part b) does it appear that Server B is responsible for 1/3 of the bills this week?
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