Your restaurant wants to test her two different recipes of a
restaurant meal. It offers the meal using one recipe to customers
at the restaurant on Mondays, Wednesdays, and Fridays, Andy offers
the meal using the second recipe to the customers who visit on
Tuesdays, Thursdays, and Saturdays. The restaurant records the
customers reactions and repeat purchases over time. which of the
following is true?
A. The study is an experiment. The controlled factor is the
recipe used to cook the meal
B. The research is an observational study
C. The study is an experiment. The controlled factor are the
days of the week.
D. This is neither an observational study nor an experiment