7) The town managers are eager to see what happens on Memorial Day weekend, since they believe that the size of the Memorial Day crowd will bring on the success (or failure) of the ensuing Summer season.

a) If we conduct an investigation into the relationship of Memorial Day crowd size (X) and Summer Season Revenues (Y), what 3 conditions would we need to show before we can conclude that we may have found a Cause-and-Effect relationship between the two?

b) For each of the 3 conditions, present an explanation or a counterexample that would cause us to Reject the Hypothesis that there is a Cause-and-Effect relationship between Memorial Day Crowd ("Cause") and Summer Revenues ("Effect").