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.

Which of the following is a valid conclusion?

Question

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. 

Which of the following is a valid conclusion?

anonymous · Answer

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