Answer
21/2:3 and 16:6 are not equivalent
I made a probability tree. Pls. see attachment.
Based on the probability tree I made, below are the probabilities
Probability of a student accepted at both Dartmouth and Harvard is:
50% x 40% = 20%
Probability of a student accepted at Dartmouth but not Harvard is:
50% x 60% = 30%
Probability of a student not accepted at Dartmouth but accepted in Harvard is:
50% x 20% = 10%
Probability of a student not accepted in both schools is:
50% x 80% = 40%
As you can see, these probabilities total 100%
Okay so think of it like this, You have the numbers 1,5,8,9,15. So you have the first "Whisker" and that stands for the lower observation which is 1. Then you have the first part of the box which is the firsrt quartile 5. The you have the middle of the box which is the median easy way to remember that is meddle middle, And the median is 8. Then you have your third quartile which 9. Then you have your greatest quartile, 15. And that is your box and whisker plot. Hope this helped!