Question

In: Statistics and Probability

The owner of a bistro called First Crush in Potsdam, NY was interested in studying the...

The owner of a bistro called First Crush in Potsdam, NY was interested in studying the tipping patterns of his customers. He collected 157 restaurant bills over a two week period that he believes provide a good sample of his customers. Seven variables on which data were collected are described below:

Variable Description

Bill

Size of the bill (in dollars)

Tip

Size of the tip (in dollars)

Credit

Paid with a credit card? n or y

Guests

Number of people in the group

Day

Day of the week: m=Monday, t=Tuesday, w=Wednesday, th=Thursday, or f=Friday

Server

Code for specific waiter/waitress: A, B, or C

PctTip

Tip as a percentage of the bill

Thanks to Tom DeRosa at First Crush for providing the tipping data.

Using statistical software, complete the following tasks:

  1. Find the best point estimate for the mean number of Guests who dine at First Crush. (0.5 pts)

​​

  1. Find the margin of error for this point estimate. (1 pt)

  1. Compute and interpret a 95% confidence interval for this point estimate. (2 pts)

​​Click or tap here to enter text.​

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