The chart above looks at grade level and what the average amount of sleep was for that grade level.
The data shows that, on average, freshmen get the most sleep (with about 7.4 hours of sleep a night). Then there is a dip in sleep for sophomore and juniors. Juniors end up getting the least amount of sleep, with an average of 6.7 hours of sleep a night. Seniors recover from the lack of sleep from junior year by getting about 6.9 hours of sleep a night. Overall, the longer students are in high school the less sleep they tend to get.
The graph for underclassmen shows that students at AAE follow closely to the normal sleep distribution demonstrated by the CDC data. The median is approximately 8 hours of sleep, which is the same as the larger sample data. The “normal” amount of sleep appears to be pushed to the right, which means it is more likely to have a greater amount of sleep (10 hours), than it is to have a smaller amount (4 hours).
The upperclassmen graph is similar to the underclassmen graph, in the sense that the data follows closely to the CDC data. Again the median is at 8, which is the same from the larger sample. The only difference from the underclassmen is that the upperclassmen tend to get less sleep on average, but not by a significant amount.
The graphs below are from the dataset the CDC conducted of highschool students across the nation. For the most part, the AAE matches what the average highschool student sleeps. The only thing to note is that upperclass men at the AAE tend to get a bit more sleep (by about 10%) than the average upperclass men across the nation.