Question 3.107

3.107 Does the new product taste better?

Before a new variety of frozen muffins is put on the market, it is subjected to extensive taste testing. People are asked to taste the new muffin and a competing brand and to say which they prefer. (Both muffins are unidentified in the test.) Is this an observational study or an experiment? Why?

3.107

Experiment because a treatment is imposed (tasting the two muffins).