Question: Three groups of gamblers were randomly selected. The first group was given $25 in casino money. The second group was given a $25 coupon for

Three groups of gamblers were randomly selected. The first group was given $25 in casino money. The second group was given a $25 coupon for food. The third group was given nothing. After a trip to the casino, each group was surveyed and asked their opinion of their casino experience.

Identify each study as being either observational or experimental.

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