/sci/ - Science & Math

>>11755534
>Already have, multiple times. But I bet you didn't complete your assigned reading yet, did you?


Let me give you an example of what I'm doing.

Let's say there is a classroom and in it are 20 students. Each student is paired up by the teacher with another student, but the students don't know. The teacher pairs them up by similar last digit of student number. The teacher then gives everyone a test and grades it. She then puts all the papers from one half of a pair in one pile , then one half the papers in another pile. She records the ratio of pass on the right pile. The answer is 50%. She then takes out of the pile on the left the other member of the pairs that failed in the pile on the right. She records the ratio of students who passed in the decimated pile. It's 40%. To know the number of pairs that passed she multiplies the ratios and gets 20%. Did the students in the right pile affect the outcome of the passes in pile to the left? How exactly did they influence each other?

My answer is they didn't.