Answer:
To calculate the observed percentage, we need to divide the number of occurrences of the event (rolling an ace) by the total number of trials (rolling the die 36 times), and then multiply by 100 to express it as a percentage.
In this case, the number of occurrences of rolling an ace is given as 5, and the total number of trials is 36. Therefore, the observed percentage can be calculated as follows:
Observed Percentage = (Number of Occurrences / Total Number of Trials) * 100
Observed Percentage = (5 / 36) * 100
Observed Percentage ≈ 13.89%
Therefore, the observed percentage of rolling an ace (one dot) when a fair die is rolled 36 times and obtaining 5 aces is approximately 13.89%.