What does SOCS stand for?

Shape, Outliers and Gaps, Center, Spread

The center number when data is sorted

What does DOFS stand for ?

Direction, Outlier, form, Strength

When questions ask if there is a relationship in the association, remember that

Correlation does not mean causation

What is a random phenomenon?

unpredictable in the short term but a pattern over time

Describe the association.

Negative to Positive, Non-linear, Strong

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AP Statistics Midterm Review

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Questions 81

Answers

1
Any point that doesn't fit with the rest is called an
Influential
Genius
Gap
Outlier
2
For describing a scatterplot, we use the acronym
SOCKS
SOCS
USA
DOFS
3
The association in this picture has a r of
0
1
-1
0.3
4
What is the term for the most common number?
IQR
Standard Deviation
Median
Mode
5
Blood types
Quantitative
Categorical
6
Age groups
Quantitative
Categorical
7
The experimental condition being imposed on the group is called the
Subjects
Level
Control group
Treatment
8
The five number summary includes:
Min, Q1, Mean, Q3, Max
Min, Q1, Mean, Q2, IQR
Min, Q1, Median, Q3, Max
Min, Q1, Mean, Q2, Max
9
What does SOCS stand for?
Shape, Center, Spread
Symmetric, Outliers, Center, Shape
Shape, Other features, Center, Spread
Shape, Outliers and Gaps, Center, Spread
10
When data is skewed, the mean is pulled
Towards the graph
In the direction of the peak
And is increased
In the direction of the skew
11
For every increase/decrease of 1 unit y, predicted x increases/decreases by ____. This is
Slope in context
R in context
Y in context
X in context
12
A placebo is
A type of experiment
Something that was on greys anatomy
A fake treatment
A blind group
13
Every time we flip a coin the probability of heads is
1/4
1/2
1/6
1
14
You can display categorical data on all of the following charts except
Pie chart
Contingency Table
Histogram
Bar graph
15
What is the interquartile range?
Q4-Q3
Q3-Q1
Q2-Q1
Q2-Q4
16
Which of the following is not a form of design?
Double blind
Completely Randomized
Blocking
Matched pairs
17
The word "or" in a probability question signifies
Addition
Division
Multiplication
Subtraction
18
If a ___ ____ is done correctly, it can determine cause and effect.
observational study
Bias
Experiment
Stats simulation
19
true or false. You must control variables, randomize, and replicate an experiment to be valid.
False
True
20
A sampling scheme that first splits into homogeneous groups
Cluster
Simulation
SRS
Stratified
21
Describe the shape of this distribution.
Bimodal and skewed.
Unimodal and fairly symmetric
Uniform
Skewed left
22
The median is the
The mean
Middle number
The average
The center number when data is sorted
23
This association has a r of
1
-1
0.3
0
24
Which of the following is not a good way to take a sample from a population?
Cluster
Stratified
Convience
Systematic
25
In the Linear regression equation, a stands for
Y-int
Slope
Strength
R^2
26
How do you mathematically figure out if a point is an outlier or not?
If it looks weird it must be an outlier
Determine if it changes the slope of the data
1.5IQR from Q1 and Q3
See if it looks unusual
27
A 5 number summary is used for a
Bar Graph
Box plot
Histogram
Pie chart
28
All of the following are types of quantitative data except
Weight
Distance
Height
Color
29
Type of sample. Randomly select 2 departments and survey all the people in it.
Stratified
Cluster
SRS
Systematic
30
What does DOFS stand for ?
Direction, Outlier, Formality, Strength
Direction, Outlier, form, Strength
Direction, Outlier, Form, Scatter
Distance, Outlier, Form, Scatter
31
An attempt to try to get everyone in the population is called a
Census
Experiment
SRS
Representative sample
32
A type of study where no treatments are imposed and cannot show cause and effect are called
Observational studies
experimental study
Perspective Studies
Retrospective Studies
33
The proportion of times the outcome would occur for a large number of repetitions is called
A simulation
Probability
Independence
An event
34
Describe the association.
Positive, non-linear, strong
Negative, non-linear, weak
Positive, non-linear, moderate
Negative, non-linear, moderate
35
When questions ask if there is a relationship in the association, remember that
Correlation is independent
Correlation does not mean causation
Correlation means causation
It is always true
36
The two types of data we studied are
Statistical and categorical
Categorical and quantitative
Research and analytical
Quantitative and qualitative
37
T/F: Blocking must be done in an experiment
True
False
38
A study where it starts now and goes into the future is called a
Retrospective study
Perspective study
39
What is a random phenomenon?
unpredictable in the short term but a pattern over time
The randomness of an experiment
A number generated in a simulation
The mean number of surveys ran in a simulation
40
What is the equation for Linear regression?
Y=mx+b
Ax+By=C
Y=X
y=a+bx
41
Formula for finding a range.
Min-Max
Max/Min
Max+Min
Max-Min
42
Describe the association.
Positive, non-linear, moderate
No association whatsoever
Negative, Linear, Strong
Positive, Linear, Strong
43
The predicted y when x is o
y-intercept in context
sampling
bias
Slope in context
44
When running a simulation, you should _____ it several times.
Try
Repeat
Create
Invent
45
___blinding is when only the subject does not know what group they belong to
Some
Single
Triple
Double
46
What is a residual?
A number indicating how many IQR you are from the mean
A plot that shiws a curve or no curve
predicted - actual
actual - predicted
47
A and B have an r of 0.56. This would be a
moderate correlation
No correlation
strong correlation
weak correlation
48
Are amount of snow and number of car crashes likely positively or negatively associated?
Negative
Positive
49
A tree diagram helps calculate probability
False
True
50
This splits the subjects into homogenous groups before assigning treatment groups
Blocking
Matching
Randomizing
Blinding
51
Describe the association.
Negative, outlier, linear, moderate
Negative, gap, quadratic moderate
Negative to Positive, Non-linear, Strong
Positive, trumpet, weak
52
For data to be considered linear, the residual plot must:
be curved
Have no pattern
be linear
be parabolic
53
If x and y are swapped,
r flips
r doesn't change
r changes
r may change
54
Describe the association.
Strong, linear
No association
Negative, curved, weak
Positive, very weak
55
We use venn diagrams for
Comparing AP classes
Finding z scores
Probability
Statitics
56
All of the following are types of graphs used to display quantitative data except
Histogram
Stem and Leaf
Boxplot
Bar graph
57
A simple random sample is
when you pick people from each homogeneous group
Every possible sample has the same chance of selection
Really simple
when you choose heterogeneous groups
58
If results from samples do not represent the population, the sample is
Biased
SRS
People are upset they were left out
too small
59
If a point drastically changes the slope of the line of regression it is called
helpful
influential
needy
skewed
60
residual plots tell you if
a linear model is appropriate
there are outliers
Simulation
the data has an association
61
An example of a systematic sample would be asking
Everyone you like
Everyone in one group
Every 10th person
Everyone in your school system
62
The group where no treatment is applied is called the
Good group
Homogenous group
Uncontrolled group
Control group
63
A tree diagram is used for
Designing experiments
Finding z scores
Simulations
Calculating probabilities
64
If you calculate a negative residual, that means that the estimate was an
overestimate
underestimate
65
SAT scores
Categorical
Quantitative
66
True or false. Categorical data does not make sense to calculate a mean.
True
False
67
What type of graph is this?
Bar chart
Pie chart
Segmented bar graph
Histogram
68
The word "and" in a probability question signifies
Addition
Subtraction
Multiplication
Division
69
When describing the data distribution of quantitative data, we use the acronym
DOFS
NASA
FBI
SOCS
70
A type of bias that only people that feel strong respond is called a
Response bias
Voluntary response bias
No response bias
Under coverage
71
Weight
Quantitative
Categorical
72
In the Linear regression equation, what does b stand for?
slope
y int
Strength
X int
73
If a segmented bar chart shows notable differences of data, there is:
independent
an association
Unique
no association
74
If this point was removed from this association, would r increase or decrease?
Decrease
Increase
75
Making a prediction outside of the data given means you are
Inferring
Extrapolating
Hypothesizing
Exploring
76
____% of the variation in y can be explained by X. This is
R in context
X in context
Y in context
R^2 in context
77
If you calculate a positive residual, the actual value was
Less than the predicted value
More than the predicted value
78
After many trials, the probability gets closer to one number is
Disjoint
Independence
Variance
Law of large numbers
79
Being an _____ point means that it affects the slope
Noninfluential
Unusual
Influential
Unique
80
The closer our proportion gets to the hypothetical probability
Theorem of stats
Law of statistics
Law of large numbers
Law of small numbers
81
Describe the shape of this distribution.
uniform
Bimodal
Unimodal and Symmetric
Skewed Right

AP Statistics Midterm Review Flashcards | StudBud