Final answer:
The relative frequency interpretation of the probability of an on-time arrival for a particular flight is that approximately 64% of the flights on this route arrive on time.
Step-by-step explanation:
The probability of an on-time arrival for a particular flight operating daily between Phoenix and Atlanta is 0.64. A relative frequency interpretation of this probability means that out of all the flights that operate on this route, approximately 64% of them arrive on time.