Alexis wanted to understand whether grade level had any relationship to their opinion on extending the school day. She surveyed some students and displayed the results in the table below: In favor Opposed Undecided Grade 9 6 4 10 Grade 10 9 13 10 Grade 11 16 17 11 Grade 12 13 7 12 Compare P(Grade 10 | opposed) with P(opposed | Grade 10). P(Grade 10 | opposed) = P(opposed | Grade 10) P(Grade 10 | opposed) P(opposed | Grade 10) There is not enough information.

Question

Alexis wanted to understand whether grade level had any relationship to their opinion on extending the school day. She surveyed some students and displayed the results in the table below:

In favor Opposed Undecided
Grade 9 6 4 10
Grade 10 9 13 10
Grade 11 16 17 11
Grade 12 13 7 12

jhonyy9 · Answer

any idea ?

Ferredoxin4 · Answer

P(A |B) means the probability of event A occurring, given that event B already happened. It is not Mutually Exclusive. Mathematically, it is P(A∩B)/P(B)

For example, P(Grade 10 | opposed) would be the probability the student was in grade 10 given that he/she voted for opposed. So that would be Probability of grade 10 AND opposed vote divided by the marginal probability of opposed, or P(Grade 10∩Opposed)/P(Opposed)

Confusinated · Answer

i think it is this one B. P(Grade 10|Opposed) < P(Opposed|Grade 10)