Problem: A shop owner is curious about the effects of working hours on customer satisfaction. They believe that customer satisfaction may go up if they have to shop open for later hours. They design an experiment where Monday and Tuesday: the shop will open at the same time and close two hours later, Wednesday and Thursday: the shop will open later and close two hours after their original time, and Friday the shop hours will stay the same. Customer will be asked to fill out a survey to rate their satisfaction 1-5 after shopping.
1. What is the independent variable?
2. How many levels are there for the independent variable?
3. What is the dependent variable?
4. What is confound?
5. How could this confound be fixed?