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AP Stat Part IV Review Flashcards | StudBud
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AP Stat Part IV Review
AP Stat Part IV Review
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A #statistics #quiz to #review for the #partIV test
Flashcards
20 cards
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Questions
20
Answers
1
A pair of 6-sided dice are rolled, what is the probability that the faces sum to 7 or 11?
2/9
1/6
1/3
7/12
2
Find the probability that a figure selected from the set is black given it has 4 or more sides
2/3
3/5
4/5
3/4
3
5% of people >50 can pass a fitness test. In a sample of 30, find the expected number that pass
2
1
1.5
1.75
4
5% of people >50 can pass a fitness test. Among 30, find the st. dev of the number that pass
0.95
1.28
1.19
0.82
5
I select 2 shapes from the set without replacement, what is the prob both are triangles?
18%
21%
25%
16%
6
Which of the following rules is one of the 5 axioms of probability
P(A or B) = P(A) + P(B) for A, B independent
P(A and B) = P(A)P(B) for A, B disjoint
P(E)= 1 + P(EC)
0 ≤ P(E) ≤ 1
7
If X~Binom(n=6, p = 0.3) find P(X<3)
6C3*(0.7)3(0.3)3+6C4*(0.7)2(0.3)4+6C5*(0.7)(0.3)5+(0.3)6
6C0*(0.7)6+6C1*(0.7)5(0.3)+6C2*(0.7)4(0.3)2
6C0*(0.7)6+6C1*(0.7)5(0.3)+6C2*(0.7)4(0.3)2+6C3*(0.7)3(0.3)3
18%
8
What is the standard deviation of a single spin?
$42.75
$48.00
$38.60
$33.27
9
If X~Binom(n = 6, p = 0.3) find P(X=4)
6C4*(0.3)4(0.7)2
6C1*(0.3)*(0.7)
6C3*(0.4)3(0.6)3
6C4*(0.3)5(0.7)
10
In statistics, what does PDF stand for?
Printable Document Format
Probability Distribution Function
Periodic Distribution Function
Probability Density Function
11
What is the expected value of a single spin?
$20
$26
$52
$104
12
If I spin the spinner three times, what is the probability that I don't win any money???
1/6
1/8
1/2
1/3
13
Given: P(garage) = 0.8 , P(pool) = 0.1, P(no garage ∩ no pool) = 0.15. Find P(pool or garage)
0.75
0.35
0.25
0.85
14
If X~Geom(p=0.1), find the P(X=8)
(0.9)8(0.1)
(0.1)8(0.9)
(0.9)7(0.1)
(0.1)7(0.9)
15
If P(A) =0.2 and P(B) =0.5 and A & B are NOT independent, which of the following could be true?
P(A ∩ B) = 0.1
None of these
P(A|B) = 0.2
P(A ∩ B) = 0.3
16
5% of people are colorblind. Among 20 people what are the chances that at least 1 is colorblind
.9999999
none of these
0.641514
0.358485
17
Which of the following is a correct definition of the probability of an event
favorable outcomes divided by total outcomes
Both of these are correct definitions
The long run relative frequency of an event
18
Which of the following is an example of a continuous random variable?
The number a attempts a person needs to make a free throw
The number of free throws a person can make in ten attempts
The number of questions a person gets right on the test
A randomly selected person's height
19
Which of the following is always true for random variables X & Y
E(X + Y) = E(X) + E(Y)
SD(X+Y) = SD(X) + SD(Y)
None of these
Var(X + Y) = Var(X) + Var(Y)
20
What is the standard deviation of 9 spins?
none of these
$128.28
$234
$384.84
