“At the end of the semester, the total scores for all students will be arranged in numerical order, the score that corresponds to the 99th percentile (S99) will be determined, and then letter grades will be
assigned based on this percentile score as follows:
A: Total Score ≥ 0.90 x S99
B: 0.80 x S99 ≤ Total Score < 0.90 x S99
C: 0.70 x S99 ≤ Total Score < 0.80 x S99
D: 0.60 x S99 ≤ Total Score < 0.70 x S99
F: Total Score < 0.60 x S99 or if you fail to complete 10 of the 12 lab
projects”
This is the explanation the department of chemistry for my college gives. But I don’t understand, so please explain it to me like I’m five.
In: Mathematics
Think of it this way. You might have 12 labs, and each would have 100 points available. The total amount of potential points is 1200. However, they don’t expect everyone to get everything. Instead, they’re going to drop the “out of 1200” part of the grade.
The 1200 will be the 99th percentile of obtained marks, meaning so high that only 1% of students get a perfect. So let’s say out of 200 students, you have 1 perfect, 1 person at 1150, and then two people each with 1100. The represent the 99th percentile 1% of the class, or 2 people, got higher). So now you’re being graded out of 1100 instead of out of 1200.
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