Question

Krissy wanted to understand whether grade level had any relationship to students' opinion on extending the school day. She surveyed some students and displayed the results in the table below:
Compare P(Grade 11 | opposed) with P(opposed | Grade 11). (1 point)

A. P(Grade 11 | opposed) > P(opposed | Grade 11)
B. P(Grade 11 | opposed) < P(opposed | Grade 11)
C. P(Grade 11 | opposed) = P(opposed | Grade 11)
D. There is not enough information.

I Think it may be D but I'm not sure

Answer 1

@Luigi0210

Answer 2

@amistre64

Answer 3

P(Grade 11 | opposed) with P(opposed | Grade 11)

that pipe is a given notation:

what is the number of grade 11 that are in opposed
what is the number of opposed that are in grade 11

Answer 4

I got A.
I don't understand this one

In a hospital ward, there are ten nurses and six doctors. Four of the nurses and three of the doctors are male. If a person is randomly selected from this group, what is the probability that the person is female or a doctor? @amistre64 @

Answer 5

what is the number of grade 11 that are in opposed

# in grade 11 that are opposed is: 15
#opposed is: 2+11+15+5 = 33

P(11|opposed) = 15/33




what is the number of opposed that are in grade 11

# opposed that are in grade 11 is: 15
# in grade 11 is: 12+15+11 = 38

P(opposed|11) = 15/38

1/33 > 1/38, so I would go with A as well

Answer 6

consider the group of all females and all doctors, how many are in that group?

6 doctors to start with, 10-4 female nurses, and we already have the female doctors in the doctor group so no need to add them again.

12 people in the female or a doctor group ...

how many people altogether? 10+6 = 16

P(f or d, given the whole group) = 12/16