Are cuteness and aggression related? A study done at Yale University tested this by showing people pictures of cute animals (like kittens and puppies) or pictures of older more serious looking animals. They tested the aggression of the subjects by giving them bubble wrap and letting them pop the bubbles. The subjects in the group shown the cute animals popped an average of 120 bubbles compared to 100 for the group seeing the pictures of the older animals.
a. Identify the explanatory variable in this study and tell whether it is categorical or quantitative.
b. Identify the response variable in this study and tell whether it is categorical or quantitative.
c. What should the researchers do so they have the possibility of determining that the type of picture affects how many bubbles are popped?