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AP Statistics Review (probability emphasis) Flashcards | StudBud
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AP Statistics Review (probability emphasis)
AP Statistics Review (probability emphasis)
50 terms
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An in depth review of the practices within the course AP Statistics. #statistics
Flashcards
50 cards
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Questions
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Answers
1
What is the Margin of Error?
3.27
1.79
1.67
3.38
2
What is the expected value of X?
.4
1.1
1
1.5
3
When testing a hypothesis for slope, use a
linear regression t-test
linear regression t-test
2 sample t-test
2 sample z-test
4
What is the probability that a randomly selected resident who has a dog also has a cat?
.6
.16
.125
.4
5
Does the following situation satisfy the rules of probability?
no, because it was not blocked based on gender
no, because the probabilities do not add up to 1
yes, because the probabilities add up to more than 1
yes, because all probabilities are less than 1
6
What is the minimum number of trials required to satisfy the large counts condition?
n=48
n=21
n=23
n=19
7
If A and B are any two events resulting from some chance process, then P(A or B) =
P(AUB)
P(A) - P(B) / P(A and B)
P(A) + P(B) – P(A and B)
P(A-B)+P(B)
8
What would be considered the treatment in this experiment?
Brand
Doll Weight
Machinery Type
Resulting Accuracy
9
The probability that an event does not occur is referred to as…
-X
X sub not
the complement of the probability or Xᶜ
the competent of the probability, or X0
10
In a test for linear relationship, the Ho is:
β > 0
β < 0
β = 0
β ≠ 0
11
In a sampling distribution of p̂...
binomial
bimodal
approximately normal
skewed left
12
What is the probability that an individual uses an Apple device, given they are female?
.54
.37
.63
.45
13
If all outcomes in the sample space are equally likely, the probability that event A occurs is…
P(A/B)
total # outcomes in sample space/ # outcomes of event A
# outcomes in event A/ total # outcomes in sample space
.5
14
What is the
μ
weight of the population of apes?
160
22.6
130.2
26
15
An SRS of size 100 is taken from population A with proportion .8 of success
Mean: .3, Standard Deviation: .047
this cannot be calculated from the information given
Mean: .44, Standard Deviation: .0797
Mean: .36, Standard Deviation: .011
16
Find the probability that the person is female and has an Android Device.
.44
.19
.22
.24
17
Which of these satisfies the independence condition for preforming a x
2
test for independence?
n=2, N=4
n=30, N=222
there is no reason for an independence condition here
n=25, N=9,002
18
When performing a chi-square test for goodness of fit, all expected values should be at least…
5
depends on the type of test
10
does not apply to chi-square
19
If A and B are independent events, the probability that A and B both occur is…
P(C)
P(AUB)
P(A) × P(B)
P(A)-P(B)
20
What is the z* value for a population proportion with a confidence level set at .995?
1.805
2.807
2.99
2.532
21
In this situation, this type of sampling would best be described as…
block on student vs teacher
SRS
convenience sample
cluster sample
22
Which of the following would be an appropriate alternative hypothesis for a x
2
of homogeneity?
B
D
C
A
23
2 events are__if they have no outcomes in common & can never occur together because P(AandB)=0
mutually exclusive/disjoint
dependent
endosymbiotic
significant
24
The Probability that any outcome of a chance process will occur is a number between...
0 and 1
-1 and 1
0 and 10
-.5 and .5
25
Carolina flipped a coin 16 times and got heads on every flip. What is P(tails on next flip)?
.5
.1
.000015
.25
26
The mean of X is…
.3
.6
18
24
27
The r² value for a scatterplot is approximately .74. The interpretation of this value is…
≈55%the variation Y can be explained byits relationship w/X
74% of the variation in X is explained by Y
≈74%the variation inY can be explained byits relationshipw/X
This represents a strong negative relationship between XandY
28
Apple believes they continually produce the same proportion of iPhones in each of the 4 colors
Chi-square test for homogeneity
Chi-square test for independence
Chi-square goodness of fit
This does not require a Chi-square test
29
Korie works at the McCormick Baseball Field...
nonresponse error
skewness to the right
undercoverage error
skewness to the left
30
Audacity has released a new sound removal interface and wishes to test how user friendly it is
cluster sample
completely randomized design
Randomized block design with a block on age
Randomized block design with a block on weight
31
The probability that event B happens given event A is denoted by P(B|A). This is called
Mutually exclusive
Conventional probability
Conditional probability
Disjoint
32
How many degrees of freedom in a linear regression t-test?
n
n - 2
(rows - 1)(columns - 1)
n - 1
33
What is the probability that an individual is male, given they use an Android device?
.32
.59
.61
.55
34
What method would be the best for an SRS of 20 of the bunnies on Tyler’s farm?
each bunny has a #on a slip of paper & 20slips are drawn out
take a blocked design with a block on gender
put all bunnies in a bag & take out 1,measure it,put it back
take a sample of the bunnies with the fluffiest tails
35
Which of the following variables is considered categorical?
GPA
Hair color
Age (in years)
Height (in inches)
36
When choosing independent SRSs...
p1+p2
p̂1-p
p2-p1
p1-p2
37
In a chi-square test statistic, which of the following formulas is correct? ✗
2
= ∑...
observed/expected2
observed x expected
(observed+expected)/expected
(observed-expected)2/expected
38
Which of the following binomial conditions has been violated in this situation?
Number: n of the chance process are not fixed in advance
Independence: the trials are not independent of each other
Binary: the trials are not successes/failures
Success:the probability of success isn't the same each trial
39
The heights of all student at HHS is a continuous random variable. What is P(student is 5'8")?
1
.0034
.00012
0
40
Data set XY (X+Y) has a mean and standard deviation respectively of…
17.98 and 5.11
15.97 and 3.61
15.25 and 3.91
17.21 and 5.78
41
This type of experiment would best be described as a….
matched pairs design
blocked experiment with a block on tulip color
stratified random sample with soil type being the strata
cluster sample
42
What is the t* value at a .99 confidence level with degrees of freedom set at 10?
3.141
3.169
2.882
3.376
43
Find the probability that the person is male or has an Apple Device.
.79
.81
.5
.07
44
Based on the scatterplot below, an appropriate estimation for the r value would be…
-.88
.2
.99
.88
45
Based on the two way table below, find the probability that the person has an Apple Device.
.32
.54
.46
.1
46
Which of the following is a geometric situation?
Elizabeth throws a ball at the hoop until she makes 1 basket
Elizabeth draws 5 cards and counts the number of hearts
Elizabeth records # of tennisballs hit over the net in7tries
Elizabeth flips a coin 16 times and records the # of tails
47
The standard deviation of a population is 12,and a sample of 64 is taken from this population
18.475
.1875
2
1.5
48
If P(w)=.20 and P(b)=.15 are independent, what is P(w and b)?
.35
.04
.75
.03
49
The new mean and standard deviation of the class, respectively, is…
83 and 4
72 and 3
89 and 6
78 and 5
50
What would be an appropriate Null hypothesis for this situation?
Ha: P(Athletes Who Pay Fees On Time) = .2
H0: P(Athletes Who Pay Fees On Time) = .59
H0: P(Athletes Who Pay Fees On Time) = .47
Ha: P(Athletes Who Pay Fees On Time) = .59
