Since Allen believes that the 3 possible outcomes in the game are equally likely to occur, we would expect each outcome to occur with a frequency of approximately 1/3 or 33.3%.
Looking at the data, we see that outcome #2 occurred much more frequently than the other outcomes (14 times out of 20 total trials). This suggests that outcome #2 may not be equally likely to occur as the other outcomes.
Therefore, the best conclusion supported by the data is that Allen's assumption that the 3 outcomes are equally likely to occur may not be accurate.