MS 150 Statistics Fall 2001 Quiz 05
Forty-two students were asked whether, when they are sick, they prefer to be left alone
to have some one care for them. The results are tabulated below. Note that 21 male
students indicated they prefer to be left alone, ten male students indicated they prefer
to be cared for, nine female students said they prefer to be left alone, and ten female
students prefer to be cared for.
|
Left alone (L) |
Cared for (C) |
|
Male (M) |
21 |
10 |
_____ |
Female (F) |
9 |
10 |
_____ |
|
_____ |
_____ |
_____ |
- Find the probability that a student in the forty-two wants to be left alone:
P(L) = _____
- Find the complement of the above: P(Not L) = _____
- Find the probability that a student in the forty-two wants is female:
P(F) = _____
- Find the probability that a student in the forty-two wants is male AND wants to be left
alone :
P(M and L) = _____
- Find the probability that a student in the forty-two wants is female AND wants to be
left alone :
P(F and L) = _____
- According to the data above, do men or women more frequently want to be left alone when
sick?
- Find the probability that a student in the forty-two wants is female OR wants to be left
alone:
P(F or L) = _____
- Find the probability that a student in the forty-two is female given that the student
wants to be cared for:
P(F, given C) = _____
- Find the probability that a student in the forty-two wants to be left alone given that
the student is female:
P(L, given F) = _____
Statistic home Lee Ling home COM-FSM home page