Angelina is a waitress at an upscale restaurant which automatically calculates a 20% tip for the waitresses. She usually receives between $300 and $350 in tips on Saturday and Sunday, but, for the last two weekends, she has only received a total of $234.

Question

HighIQReptilian · Answer

What is the question?

Vocaloid · Answer

Which of the following is a valid conclusion?

A.The amount of Angelina's tips are caused by lower restaurant sales.  B.Angelina has not been as nice to the customers, so she is not receiving the same amount of money in tips.  C.The amount of Angelina's tips is correlated to, but not caused by, lower restaurant sales.  D.No conclusion can be drawn about the relationship between restaurant sales and Angelina's tips.

HighIQReptilian · Answer

How did you know the question?

AZ · Answer

Angelina's tip is AUTOMATICALLY calculated in the bill.

The customers at this restaurant are not giving her an additional tip. When they pay the bill, they're automatically paying a 20% tip to go to Angelina.

So what can you conclude? Which answer choices can you eliminate?

Does Angelina's behavior affect her tip? Does lower restaurant sales result in lower tips?
Or is there no relationship between restaurant sales and her tips?