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Probability and Statistics EOY Review Flashcards | StudBud
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Probability and Statistics EOY Review
Probability and Statistics EOY Review
20 terms
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Questions
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Answers
1
If two events are independent, the probability of both happening is the product of their individual probabilities.
False
True
2
Which of the following pairs are most likely
independent
?
Pulling two cards without replacement
Rain and wet grass
Flipping a coin and rolling a die
Getting an A and studying
3
30 students, 18 play soccer, 12 play basketball, 5 play both, what's the probability a student plays soccer or b-ball?
25/30
20/30
18/30
30/30
4
What is the theoretical probability of rolling a 3 on a standard 6-sided die?
1/6
1/3
1/2
2/6
5
Empirical probability always equals theoretical probability.
True
False
6
Which of the following is
not
a characteristic of theoretical probability?
Assumes outcomes are equally likely
Uses actual data
Based on formulas
Can be used for a fair die roll
7
If P(A) = 0.6, P(B) = 0.5, and P(A and B) = 0.2, what is P(A or B)?
I have no idea, this is hard.
.9
.8
1.1
8
What is the probability of landing on blue
and
the number 3?
1/9
1/10
1/20
1/8
9
Mutually exclusive events can happen at the same time.
True
False
10
You flip a coin 100 times and it lands on heads 56 times. What is the empirical probability of heads?
.50
.60
.56
.44
11
Empirical probability is based on actual data or observation.
True
False
12
If P(A) = 0.4 and P(B) = 0.5 and A and B are mutually exclusive, what is P(A or B)?
1.8
.9
.8
.1
13
What is the probability a minute is
not
devoted to commercials?
.3
.4
.6
.1
14
The sum of probabilities for all outcomes in a sample space is always 1.
False
True
15
Which formula is used for "or" probability when events A and B are
not
mutually exclusive?
1 - P(A)
P(A) • P(B)
P(A) + P(B) - P(A and B)
P(A) + P(B)
16
If events A and B are not mutually exclusive, you must subtract the overlap when finding P(A or B).
False
True
17
If P(E) = 0.7, what is P(not E)?
0.3
0.9
1.3
0.7
18
If the probability of rain tomorrow is 0.2, then the probability it will not rain is 0.8.
False
True
19
A coin is flipped and a die is rolled. What is the probability of getting heads and a 4?
1/6
1/2
1/12
1/10
20
What is the probability of landing on yellow?
182/197
1/2
1/3
2/12
