I conducted field study regarding green consumption.
I manipulated 3 types of eco friendly messages and each type of messages was exposed to the restaurant visitors for each week.
So I got the total number of visitors and the total amount of waste for each week.
However, I don't know who visisted the restaurant and how much waste each visitor threw away.
I only got the average amount of waste per visitor.
I want to compare two types of messages were persuasive comparing to control condition.
Without observed data set, can I statistically compare the average values?
Thanks for your help!