Paola and her assistant Alan are tracking how long it takes for front desk staff to check in a new guest to the hotel. Paola records the check in time at 5 minutes even, and Alan records the check in time as 4 minutes and 30 seconds. They calculate the IOA and get an 1OA score of a 90%. This is an example of: Scored-interval IOA Total duration IOA Mean duration-per-occurrence IOA Mean count-per-interval IOA