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AP Statistics Midterm Review
AP Statistics Midterm Review
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This is my version of a practice midterm test for the best class ever, AP Stats. Happy learning:)
Flashcards
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Questions
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Answers
1
According to the model, ____ increases/decreases approx ____ by ____. This is
R in context
Slope in context
X in context
Y in context
2
The first bulls eye is on the 3rd arrow
Normal model
Geomertic model
Binomial model
Stats model
3
Describe the shape of this distribution.
Uniform
Unimodal and symmetric
Bimodal and skewed.
Skewed left
4
A z-score is
How many standard deviations from the mean a value is
How far you are from A
Your IQ score
How far you are from the mean
5
Weight
Quantitative
Categorical
6
When running a simulation, you should _____ it several times.
Invent
Repeat
Try
Create
7
Lying is a type of
Mean act
No response bias
Cluster sample
Response bias
8
Data are not curved if a residual
Shows a curve
Shows form
Shows no form
Shows a circle
9
Which of the following is not a good way to sample a population?
Stratified
Convience
Systematic
Cluster
10
Type of sample. Randomly select a department and survey all the people in it.
Systematic
Stratified
SRS
Cluster
11
An effect is ____ _____ if it is too great to be caused by chance.
Very significant
Quite significant
Systematically significant
Systematically wrong
12
Quadratic data has an r of
0.8
1
0
-1
13
You can display categorical data on all of the following charts except
Bar graph
Segmented Bar Chart
Pie chart
Histogram
14
___blinding is when the subject does not know what group they belong to or what the study is on
Triple
Some
Double
Single
15
How do you mathematically figure out if a point is an outlier or not?
If it looks weird it must be an outlier
Figure out the lower and upper fences
Determine if it changes the slope of the data
See if it looks unusual
16
What results from samples that do not represent the population?
Under coverage
People are upset they were left out
Inaccurate numbers
Bias
17
true or false. You must control variables, randomize, and replicate an experiment to be valid.
False
True
18
Making a prediction outside of the data given means you are
Exploring
Hypothesizing
Extrapolating
Inferring
19
If this point was removed from this association, would it increase or decrease?
Decrease
Increase
20
The experimental condition being imposed on the group is called the
Level
Treatment
Control group
Subjects
21
A study where it starts now and goes into the future is called a
Retrospective study
Perspective study
22
What does DUFuS stand for ?
Distance, Unusual, Form, Scatter
Direction, Unique, Form, Scatter
Direction, Unusual, Formality, Strength
Direction, unusual, form, scatter/strength
23
All of the following are stated in the Bernoulli trials except
Trials are independent
Only 2 outcomes
10% rule
Probability of success doesn't change
24
The Normal Model is also known as the
Best model
The 25-50-75-100 Rule
The 68-95-99.7 Rule
Fundamental Theroem of Stats
25
The 5 number summary is used for this type of graph.
Pie chart
Bar graph
Histogram
Box plot
26
A simple random sample is
when you pick one person from each homogenous group
Everyone in a space that has the same chance of selection
Really easy
Really simple
27
In the LinReg equation, what does B stand for?
y int
Strength
slope
X int
28
This association has a r of
0.3
-1
0
1
29
A ____study is where the data has already been collected and you study certain aspects.
Perspective
Retrospective
30
We use venn diagrams for
Finding z scores
Comparing AP classes
Statitics
Probability
31
If you calculate a positive residual, the actual value was
Less than the predicted value
More than the predicted value
32
The group where no treatment is applied is called the
Control group
Good group
Homogenous group
Uncontrolled group
33
Describe the shape of this distribution.
unifrom
Skewed Right
Bimodal
Unimodal and Symmetric
34
The binomial model tells you
Percents
Number of people
Probabilities
The two models
35
What is a residual?
A plot
A number indicating how many SD you are from the mean
A plot that shiws a curve or no curve
The difference b/t the observed y value+predicted y value
36
All of the following are types of graphs used to display quantitative data except
Histogram
Pictogram
Timeplot
Stem and Leaf
37
Which is correct?
Both-Given/Both
Both+Given
Both|Given
Given|Both
38
What is a random variable?
The mean number of surveys ran in a simulation
The randomness of an experiment
Value based on the outcome of a random event
A number generated in a simulation
39
When data is skewed, the mean is pulled
In the direction of the skew
Towards the graph
In the direction of the title
And is increased
40
If a segmented bar chart shows notable differences of data, then it is
Not independent
Even
Unique
Independent
41
Age groups
Quantitative
Categorical
42
In the LinReg equation, A stands for
Y-int
Strength
R^2
Slope
43
The closer our proportion gets to the hypothetical probability
Law of large numbers
Law of statistics
Law of small numbers
Theorem of stats
44
For describing a association, we use the acronym
CUSS
USA
SuFUD
DUFuS
45
Formula for Figuring out midrange
Min+max/range
Range-1/2
Range^2
1/2Range
46
A and B have an r of 0.56. If A was less than the mean by 1.3 SDs, then B was _____ the mean
0.728 z scores below the mean
0.386 SDs above the mean
0.728 SDs below the mean
.0987 SD above the mean
47
The word or in a probability question signifies
Multiplication
Addition
Division
Subtraction
48
If a point is far left or far right from the mean, then it has
weight
skewness
height
leverage
49
If x and y are swapped,
R doesn't change
R flips
R may change
R changes
50
If you calculate a negative residual, that means that the actual value was
More than the predicted value
Less than the predicted value
51
When describing the data distribution of quantitative data, we use the acronym
NASA
CUSS
DUFuS
FBI
52
A tree diagram is used for
Simulations
Finding z scores
Calculating probabilities
Designing experiments
53
All of the following are types of quantitative data except
Height
Zip codes
Weight
Distance
54
A 5 number summary is used for a
Pie chart
Bar Graph
Box plot
Histogram
55
Any point that doesn't fit with the rest is called an
Gap
Influential
Outlier
Genius
56
True or false. The picture is an example of the normal model.
True
False
57
What type of graph is this?
Bar chart
Histogram
Pie chart
Segmented bar graph
58
Describe the association.
No association whatsoever
Negative, curved, weak
Positive, gap, very weak
Trumpet
59
If a ___ ____ is done correctly, it can determine cause and effect.
Stats simulation
Stats study
Experimental design
Response bias
60
All of the following are ways you can rexpress data except
Log X, log y
x^1/2
Log y
1/y
61
For questions that ask for a percent to be calculated, we use
Invnorm
Normalcdf
62
An attempt to try to get everyone in the population is called a
Experiment
Representative sample
Approval
Census
63
True or false. Categorical data does not make sense to calculate a mean.
True
False
64
Describe the association.
Positive, Quadratic, Strong
Negative, gap, quadratic moderate
Negative, outlier, linear, moderate
Positive, trumpet, weak
65
Things that cannot happen at the same time are
Mutually inclusive
Variance
Independence
Mutually exclusive
66
An example of a systematic sample would be asking
Everyone in your school system
Everyone you like
Every 10th person
Everyone in one group
67
What is the equation for LinReg?
Ax+By=C
y=a+bx
Y=mx+b
Y=X
68
What is the term for the most common number?
Standard Deviation
Median
Midrange
Mode
69
Formula for finding a range.
Max/Min
Max-Min
Min-Max
Max+Min
70
A type of study where no treatments are imposed and cannot show cause and effect are called
Retrospective Studies
experimental study
Observational studies
Perspective Studies
71
A placebo is
A fake treatment
A blind group
Something that was on greys anatomy
A type of experiment
72
This reduces variation and splits the subjects into homogenous groups.
Blinding
Randomizing
Blocking
Matching
73
Are a snow day and the number of car crashes that day positively or negatively associated?
Negative
Positive
74
The two types of data we studied are
Categorical and qualitative
Statistical and Probabilistic
Research and analytical
Quantitative and categorical
75
This is when you multiply 0.05n and subtract that number from the data to figure out New mean
0.05% trimmed mean
5% data
0.05 cut mean
5% trimmed mean
76
T/F: Blinding, randomization, blocking, and placebos are all required for experiments.
False
True
77
A sampling scheme that combines several sampling methods
Simulation
A process
Multistage
Multi processed
78
When questions ask if there is a relationship in the association, remember that
Correlation does not mean causation
Correlation means causation
It is always true
Correlation is independent
79
Phone numbers
Categorical
Quantitative
80
SAT scores
Categorical
Quantitative
81
The association in this picture has a r of
0.3
0
1
-1
82
You ask people if they are right handed until you get a left handed. This is a
Normal model
Geometric model
Algebraic model
binomial model
83
Which of the following is not a form of design?
Matched pairs
Completely Randomized
Blocking
Double blind
84
When the sample need to be less than 10% of the population, it is called the
10% theorem
10% condition
10% rule
10% model
85
Another way to express y=a+bx is
y=bo+b1x
y=my+b
Bo+Bix
Y=mx+b
86
Describe the association.
Positive, curved, moderate
No association whatsoever
Positive, Linear, Strong
Negative, Linear, Strong
87
if I multiply each X by 100, add 12 to each y, and switch X and y, r
changes
increases
decreases
stays the same
88
____% of the variation in y can be explained by X. This is
X in context
R^2 in context
R in context
Y in context
89
Being an _____ point means that it affects the slope
Unique
Unusual
Influential
Noninfluential
90
The proportion of times the outcome would occur for a large number of repetitions is called
Probability
Independence
An event
A simulation
91
Describe the association.
Negative, curved, weak
Positive, curved, strong
Positive, curved, moderate
Negative, curved, moderate
92
For questions that give you a percent and have you find an X , we use
Normal Model
Invnorm
93
A parameter is
A unit of stats
A number calculated from a population.
A number calculated from a sample.
The distance around a shape.
94
What is the interquartile range?
Q2-Q4
Q3-Q1
Q4-Q3
Q2-Q1
95
A type of bias that only people that feel strong respond is called a
Under coverage
Voluntary response bias
No response bias
Response bias
96
What does CUSS stand for?
Center, shape, spread
Center, unusual, shape, spread
Center, unique, spread, skewed
Centroid, unusual, shape, spread
97
The median is the
Middle number
The average
The center number when data is sorted
The monkey in the middle
98
The word and in a probability question signifies
Multiplication
Division
Addition
Subtraction
