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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
Describe the association.
Negative, curved, weak
Trumpet
No association whatsoever
Positive, gap, very weak
2
A parameter is
A number calculated from a population.
A unit of stats
A number calculated from a sample.
The distance around a shape.
3
For questions that give you a percent and have you find an X , we use
Normal Model
Invnorm
4
How do you mathematically figure out if a point is an outlier or not?
Determine if it changes the slope of the data
If it looks weird it must be an outlier
See if it looks unusual
Figure out the lower and upper fences
5
All of the following are stated in the Bernoulli trials except
Probability of success doesn't change
Trials are independent
Only 2 outcomes
10% rule
6
In the LinReg equation, A stands for
Strength
Y-int
R^2
Slope
7
What is the interquartile range?
Q2-Q1
Q4-Q3
Q3-Q1
Q2-Q4
8
When describing the data distribution of quantitative data, we use the acronym
FBI
NASA
DUFuS
CUSS
9
Describe the shape of this distribution.
Unimodal and Symmetric
unifrom
Bimodal
Skewed Right
10
An effect is ____ _____ if it is too great to be caused by chance.
Systematically wrong
Quite significant
Systematically significant
Very significant
11
The experimental condition being imposed on the group is called the
Control group
Level
Treatment
Subjects
12
A simple random sample is
Everyone in a space that has the same chance of selection
Really simple
Really easy
when you pick one person from each homogenous group
13
What does DUFuS stand for ?
Direction, unusual, form, scatter/strength
Direction, Unique, Form, Scatter
Direction, Unusual, Formality, Strength
Distance, Unusual, Form, Scatter
14
All of the following are w questions associated with data except
Which
What
Why
Who
15
You can display categorical data on all of the following charts except
Contingency Table
Histogram
Bar graph
Pie chart
16
Things that cannot happen at the same time are
Variance
Independence
Mutually inclusive
Mutually exclusive
17
A type of bias that only people that feel strong respond is called a
No response bias
Response bias
Under coverage
Voluntary response bias
18
What is a residual?
The difference b/t the observed y value+predicted y value
A plot that shiws a curve or no curve
A number indicating how many SD you are from the mean
A plot
19
Quadratic data has an r of
0
0.8
1
-1
20
When re-exppressing data, you must run the ____ to check for a curve.
Model
Stats buttom
LinReg
Simulation
21
The word or in a probability question signifies
Subtraction
Multiplication
Division
Addition
22
The Normal Model is also known as the
The 68-95-99.7 Rule
Fundamental Theroem of Stats
Best model
The 25-50-75-100 Rule
23
A tree diagram is used for
Finding z scores
Calculating probabilities
Simulations
Designing experiments
24
A study where it starts now and goes into the future is called a
Retrospective study
Perspective study
25
The proportion of times the outcome would occur for a large number of repetitions is called
An event
Probability
A simulation
Independence
26
___blinding is when the subject does not know what group they belong to or what the study is on
Single
Triple
Double
Some
27
T/F: Experimental deisgn, principles,treatment, blinding, +response variable are needed 4 expe
True
False
28
This reduces variation and splits the subjects into homogenous groups.
Blocking
Blinding
Randomizing
Matching
29
Describe the association.
Positive, curved, moderate
Negative, curved, weak
Negative, curved, moderate
Positive, curved, strong
30
What is a random variable?
A number generated in a simulation
Value based on the outcome of a random event
The randomness of an experiment
The mean number of surveys ran in a simulation
31
The binomial model tells you
Number of people
Probabilities
Percents
The two models
32
According to the model, ____ increases/decreases approx ____ by ____. This is
Y in context
R in context
Slope in context
X in context
33
Formula for Figuring out midrange
1/2Range
Range-1/2
Min+max/range
Range^2
34
true or false. You must control variables, randomize, and replicate an experiment to be valid.
False
True
35
The 5 number summary is used for this type of graph.
Bar graph
Box plot
Histogram
Pie chart
36
If this point was removed from this association, would it increase or decrease?
Decrease
Increase
37
A placebo is
A fake treatment
A blind group
A type of experiment
Something that was on greys anatomy
38
In the LinReg equation, what does B stand for?
y int
slope
Strength
X int
39
What results from samples that do not represent the population?
People are upset they were left out
Bias
Inaccurate numbers
Under coverage
40
When running a simulation, you should _____ it several times.
Create
Try
Invent
Repeat
41
The median is the
The average
The monkey in the middle
The center number when data is sorted
Middle number
42
True or false. Categorical data does not make sense to calculate a mean.
True
False
43
if I multiply each X by 100, add 12 to each y, and switch X and y, r
decreases
increases
stays the same
changes
44
____% of the variation in y can be explained by X. This is
X in context
Y in context
R^2 in context
R in context
45
If a segmented bar chart shows notable differences of data, then it is
Even
Independent
Unique
Not independent
46
Any point that doesn't fit with the rest is called an
Influential
Genius
Gap
Outlier
47
An attempt to try to get everyone in the population is called a
Representative sample
Experiment
Approval
Census
48
Which of the following is not a good way to sample a population?
Systematic
Convience
Stratified
Cluster
49
A z-score is
How far you are from the mean
How many standard deviations from the mean a value is
How far you are from A
Your IQ score
50
Another way to express y=a+bx is
y=bo+b1x
Y=mx+b
y=my+b
Bo+Bix
51
The two types of data we studied are
Quantitative and qualitative
Categorical and quantitative
Research and analytical
Statistical and categorical
52
Are a snow day and the number of car crashes that day positively or negatively associated?
Negative
Positive
53
This association has a r of
0.3
1
-1
0
54
Age groups
Quantitative
Categorical
55
All of the following are types of graphs used to display quantitative data except
Histogram
Timeplot
Stem and Leaf
Pictogram
56
This is when you multiply 0.05n and subtract that number from the data to figure out New mean
0.05 cut mean
0.05% trimmed mean
5% trimmed mean
5% data
57
Phone numbers
Categorical
Quantitative
58
Which of the following is not a form of design?
Double blind
Completely Randomized
Blocking
Matched pairs
59
For questions that ask for a percent to be calculated, we use
Invnorm
Normalcdf
60
A ____study is where the data has already been collected and you study certain aspects.
Perspective
Retrospective
61
If you calculate a positive residual, the actual value was
Less than the predicted value
More than the predicted value
62
When the sample need to be less than 10% of the population, it is called the
10% condition
10% model
10% theorem
10% rule
63
Being an _____ point means that it affects the slope
Unusual
Unique
Noninfluential
Influential
64
If a ___ ____ is done correctly, it can determine cause and effect.
Stats study
Response bias
Experimental design
Stats simulation
65
Describe the association.
Positive, trumpet, weak
Negative, outlier, linear, moderate
Positive, Quadratic, Strong
Negative, gap, quadratic moderate
66
The closer our proportion gets to the hypothetical probability
Law of statistics
Law of large numbers
Law of small numbers
Theorem of stats
67
All of the following are types of quantitative data except
Zip codes
Height
Distance
Weight
68
The word and in a probability question signifies
Subtraction
Multiplication
Addition
Division
69
When data is skewed, the mean is pulled
And is increased
In the direction of the title
In the direction of the skew
Towards the graph
70
An example of a systematic sample would be asking
Everyone you like
Everyone in your school system
Everyone in one group
Every 10th person
71
The association in this picture has a r of
1
0
-1
0.3
72
Formula for finding a range.
Max-Min
Min-Max
Max/Min
Max+Min
73
We use venn diagrams for
Statitics
Probability
Finding z scores
Comparing AP classes
74
If a point is far left or far right from the mean, then it has
weight
skewness
height
leverage
75
SAT scores
Quantitative
Categorical
76
True or false. The picture is an example of the normal model.
False
True
77
Type of sample. Randomly select a department and survey all the people in it.
Stratified
Systematic
Cluster
SRS
78
For describing a association, we use the acronym
USA
SuFUD
DUFuS
CUSS
79
What is the term for the most common number?
Midrange
Standard Deviation
Mode
Median
80
Describe the shape of this distribution.
Bimodal and skewed.
Uniform
Skewed left
Unimodal and symmetric
81
Making a prediction outside of the data given means you are
Exploring
Extrapolating
Hypothesizing
Inferring
82
Which is correct?
Given|Both
Both-Given/Both
Both+Given
Both|Given
83
A type of study where no treatments are imposed and cannot show cause and effect are called
Observational studies
Perspective Studies
experimental study
Retrospective Studies
84
What does CUSS stand for?
Center, shape, spread
Center, unique, spread, skewed
Centroid, unusual, shape, spread
Center, unusual, shape, spread
85
What is the equation for LinReg?
Y=X
y=a+bx
Y=mx+b
Ax+By=C
86
A 5 number summary is used for a
Box plot
Pie chart
Bar Graph
Histogram
87
What type of graph is this?
Pie chart
Bar chart
Histogram
Segmented bar graph
88
Weight
Quantitative
Categorical
89
The first bulls eye is on the 3rd arrow
Stats model
Geomertic model
Normal model
Binomial model
90
All of the following are ways you can rexpress data except
x^1/2
Log y
Log X, log y
1/y
91
Lying is a type of
No response bias
Response bias
Mean act
Cluster sample
92
When questions ask if there is a relationship in the association, remember that
Correlation is independent
It is always true
Correlation does not mean causation
Correlation means causation
93
Data are not curved if a residual
Shows a curve
Shows no form
Shows a circle
Shows form
94
If x and y are swapped,
R doesn't change
R may change
R changes
R flips
95
You ask people if they are right handed until you get a left handed. This is a
binomial model
Geometric model
Normal model
Algebraic model
96
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
0.386 SDs above the mean
0.728 SDs below the mean
.0987 SD above the mean
0.728 z scores below the mean
97
The group where no treatment is applied is called the
Homogenous group
Good group
Uncontrolled group
Control group
98
If you calculate a negative residual, that means that the actual value was
Less than the predicted value
More than the predicted value
99
Describe the association.
Positive, Linear, Strong
No association whatsoever
Positive, curved, moderate
Negative, Linear, Strong
100
A sampling scheme that combines several sampling methods
Multistage
Multi processed
Simulation
A process
