A research group interested in comparing the effect of different types of music on short-term memory gathers 200 volunteers for a study. One group will listen to a hip hop music playlist while trying to memorize a list of 20 words. A second group will listen to a playlist of orchestral music while trying to memorize the list of 20 words. After a break, the number of words recalled correctly by each individual is measured and the results for the two groups are compared. Please answer each of the following questions by replying to this discussion:

1. Is this an experimental study or an observational study? Explain your reasoning

2. Which group do you hypothesize will recall more words? Explain your reasoning.