How would we solve part (b) in https://apcentral.collegeboard.org/pdf/ap-2020exam-sample-questions-statistics.pdf ?
GM corn is more likely to yield at least 123 bushels per acre. This video explains why.
To summarize what was said in the video:
The median yield for GM corn is 127.5. That means that half of the time, GM corn will yield less than 127.5 bushels per acre and the other half of the time it will yield more than 127.5. 123 is in the lower half of the yields (since 123<127.5), so over half of the time, GM corn should give you at least 123 bushels per acre.
On the other hand, regular corn’s median is 119.4. Half of the time, regular corn will yield less than 119.4 bushels per acre, and the other half of the time, it will yield more than 119.4 bushels per acre. Since 123>119.4, 123 is in the upper half, so less than half of the time, regular corn will have a yield of 123 or more bushels per acre.