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AP Stats Unit 5 Review Flashcards | StudBud
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AP Stats Unit 5 Review
AP Stats Unit 5 Review
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Probability review for AP Statistics
Flashcards
14 cards
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Practice quiz
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Questions
14
Answers
1
What is the probability that you choose a boy given that that person chooses sports?
.625
.32
.5
none of these
2
What is the probability that you choose someone that prefers dance or sports?
cant answer since categories are not independent.
.68
.92
.76
3
If 60% of seniors have a job, 35% have a car, 20% have both, how many have neither?
huh?
95%
5%
25%
4
If P(B|A)=P(B) and P(B|A
c
)=P(B) then
A and B are not independent or disjoint
A and B are not independent but is disjoint.
A and B are independent
A and B are disjoint
5
Probability
predicts how random events behave long term
can not be determined exactly
cannot be 0
may have been created by the devil to hurt teenagers
6
P(snow)=.15; P(no heat)=.08. PHS is closed if both occur. If ind. what is P(PHS Closed)
.12
.07
.23
.012
7
what is probability of picking three red cards in a row out of a deck
without
replacing?
.5
.117
none of these
.125
8
What is the probability of having four children and at least one girl?
.125
.9375
.0625
.5
9
What is the probability that you choose a female or someone who prefers movies?
.76
.6
cant answer since categories are not independent.
.92
10
If A and B are independent then
P(A|B)=P(A)
All of these
P(A and B)=P(A)P(B)
P(B|A)=P(B)
11
Which of the following is false?
The law of large numbers applies only to long term prob
If events are independent then P(B|A)=P(B)
If replacement occurs events are dependent
if events are mutually exclusive then P(A or B) = P(A)+P(B)
12
If prob. of being late to school is .08, what is prob. that you are late at least once 5 days?
.08
.341
.32
.92
13
If P(A)=.5 and P(B)=.3 what is P(A or B) if disjoint (mutually exclusive)?
.5
.8
.3
none of these
14
If the probability of having a boy is .5, what is the probability of having 4 children and they are all boys.
.125
.25
.0625
.5
