Final answer:
The experimental probability of drawing a yellow golf ball is 1/5 or 0.2.
Step-by-step explanation:
To find the experimental probability of drawing a yellow golf ball, we need to determine the number of times a yellow ball was drawn and divide it by the total number of draws. From the given information, we can see that a yellow ball was drawn 4 times out of 20. So the experimental probability of drawing a yellow golf ball is 4/20, which simplifies to 1/5 or 0.2.