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