AP Statistics
Name:
Directions
:
Do all of your work on these sheets.
Write sequentially and show all work.
Part 1:
Multiple Choice.
Circle the letter corresponding to the best answer.
1.
An assignment of probability must obey which of the following?
(a) The probability of any event must be a number between 0 and 1, inclusive.
(b) The sum of all the probabilities of all outcomes in the sample space must be exactly 1.
(c) The probability of an event is the sum of the outcomes in the sample space which make up the
event.
(d) All of the above.
(e) A and B only.
2.
Event
A
occurs with probability 0.2. Event
B
occurs with probability 0.8. If
A
and
B
are disjoint
(mutually exclusive), then
(a) P(A and B) = 0.16.
(b) P(A or B) = 1.0.
(c) P(A and B) = 1.0.
(d) P(A or B) = 0.16.
(e) Both A and B are true.
3.
A fair coin is tossed four times, and each time the coin lands heads up.
If the coin is then tossed
1996 more times, how many heads are most likely to appear for these 1996 additional tosses?
(a) 996
(b) 998
(c) 1000
(d) 1996
(e) None of the above.
The answer is __________________________.
4.
A die is loaded so that the number 6 comes up three times as often as any other number.
What is
the probability of rolling a 1 or a 6?
(a) 1/3
(b) 1/4
(c) 1/2
(d) 2/3
(e) None of the above.
The answer is __________________________.
Questions 5 and 6 relate to the following:
In a particular game, a fair die is tossed. If the number of
spots showing is either four or five, you win $1. If the number of spots showing is six, you win $4.
And if the number of spots showing is one, two, or three, you win nothing. You are going to play the
game twice.
5.
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 Spring '11
 Smith
 Statistics, Probability, Probability theory

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