Disney World is going to initiate the use of wireless tracking wristbands for visitors to the Orlando, Florida, theme park. The new MagicBandhas several functions: it serves as a hotel room key and park entry pass, and is linked to customer credit card information. Visitors wearing these wristbands will have immediate access to certain rides. Suppose a random sample of Disney World visitors wearing wristbands is obtained and the wait time for Big Thunder Mountain is recorded for each.
(a) Is this an observational or an experimental study?