The observed minus the predicted value for values in an LSRL

The mean of a density curve is the point where the curve

would balance if it were a solid figure

A simple random sample is

Each group of size "n" has the same chance of selection

Describe univariate data: what does CUSS stand for?

Shape, Outlier, Center, Context , spread

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

Correlation does not mean causation

What does DOFS stand for ?

Direction, Outlier, Form, Strength

What is a random variable?

Value based on the outcome of a random event

studbud

AP Stats Midterm Practice

84 termsStudBud Administration2 plays

This is my borrowed version of a practice midterm test for the best class ever, AP Stats. Happy learning:) #stats

Flashcards84 cardsFPractice quizPHost liveL

Questions 84

Answers

1
An example of a systematic sample would be asking
Everyone in your school system
Everyone you like
Every 10th person
Everyone in one group
2
Describe the association.
Negative, gap, quadratic moderate
Positive, trumpet, weak
non-linear, strong
Negative, outlier, linear, moderate
3
In the LinReg equation, what does "b" stand for?
y-int
X-int
slope
Strength
4
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
5
A type of study where no treatments are imposed and cannot show cause and effect are called
Perspective Studies
Observational studies
Retrospective Studies
experimental study
6
What kind of data are Phone numbers
Quantitative
Categorical
7
You can display categorical data on all of the following charts except
Pie chart
Contingency Table
Histogram
Bar graph
8
When running a simulation, you should _____ it several times.
Invent
Try
Repeat
Create
9
In the LinReg equation, "a" stands for
Slope
R^2
Strength
Y-int
10
If you calculate a negative residual, that means that the actual value was
Less than the predicted value
More than the predicted value
11
Describe the association.
Positive, Linear, Strong
Negative, Linear, Strong
No association whatsoever
Positive, curved, moderate
12
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
13
What is a residual?
The average of the means
A left over data point
The observed minus the predicted value for values in an LSRL
A number indicating how many SD you are from the mean
14
For questions that ask us to calculate a percent of an area under the normal curve, we use
Normalpdf
Statarea
Normalcdf
Invnorm
15
An attempt to try to get everyone in the population is called a
Experiment
Representative sample
Census
Approval
16
The two types of data we studied are
Research and analytical
Categorical and qualitative
Statistical and categorical
Categorical and quantitative
17
If you calculate a positive residual, the actual value was
More than the predicted value
Less than the predicted value
18
A type of bias that only people that feel strong respond is called a
Voluntary response bias
Under coverage
No response bias
Response bias
19
Describe the association.
Negative, curved, moderate
Positive, curved, moderate
Negative, curved, weak
Positive, curved, strong
20
Describe the shape of this distribution.
Skewed left
Bimodal and skewed.
Unimodal and symmetric
Uniform
21
A sampling scheme that combines several sampling methods
Simulation
Multistage
Multi processed
A process
22
The mean of a density curve is the point where the curve
cannot be determined
is the midpoint of the min and max
would balance if it were a solid figure
cuts the data into two equal parts
23
If x and y are swapped,
r changes
r flips
r doesn't change
r may change
24
Variance for the math teachers at HSS is 4. Find the standard deviation for the teachers
2
8
16
4
25
The experimental condition being imposed on the group is called the
Control group
Treatment
Subjects
Level
26
A simple random sample is
Each group of size "n" has the same chance of selection
when you pick one person from each homogenous group
Everyone has the same chance of being selected
You pick a random group of people
27
Describe univariate data: what does CUSS stand for?
Centroid, unusual, shape, spread
Shape, Outlier, Center, Context , spread
Center, unique, spread, skewed, context
Careless, shape, spread
28
When re-exppressing data, you must run the ____ to check for a curve.
LinReg
Model
Stats buttom
Simulation
29
Quadratic data has an r of
1
0.8
-1
0
30
True or false. Categorical data does not make sense to calculate a mean.
False
True
31
When the sample needs to be less than 10% of the population, you are checking for :
Randomness
Normality
Independance
mean
32
True or false. The picture is an example of the normal curve.
True
False
33
As sample size increases, The our proportion our proportion is less variable around the true p
Law of large numbers
Fundamental Theorem of Stats
Law of small numbers
Central limit Theorem
34
Formula for finding a range.
Max/Min
Min-Max
Max+Min
Max-Min
35
Making a prediction outside of the data given means you are
Extrapolating
Guessing
Hypothesizing
Inferring
36
Describe the association.
No association whatsoever
Negative, curved, weak
Trumpet
Positive, gap, very weak
37
A tree diagram is used for
Finding z scores
Designing experiments
Calculating probabilities
Simulations
38
This association has a r of
0.3
1
-1
0
39
Are a snow day and the number of car crashes that day positively or negatively associated?
Positive
Negative
40
The mean of the probability distribution is:
2
1
3
1.5
41
When questions ask if there is a relationship in the association, remember that
Correlation means causation
It is always true
Correlation does not mean causation
Correlation is independent
42
When describing the data distribution of quantitative data, we use the acronym
SOCCS
FBI
NASA
DUFuS
43
Things that cannot happen at the same time are
Independant
Random
Mutually Exclusive
Mutually inclusive
44
In 1 variable data, you can find an outlier by using:
If it is more than 2 standard deviations from the mean
The residual plot
If it looks far from the last point.
The 1.5 IQR Rule
45
Which of the following is not a good way to sample a population?
Systematic
Stratified
Cluster
Convenience
46
An effect is ____ _____ if it is too great to be caused by chance.
Quite significant
unlikely
Statistically significant
Systematically wrong
47
What does DOFS stand for ?
Direction, Outlier, Form, Skew
Direction, Outlier, Form, Strength
Distance, Outlier, Form, Scatter
Direction, Outlier, Full, Strength
48
____% of the variation in y can be explained by the LSRL of y on X. This is
R in context
X in context
R^2 in context
Y in context
49
What type of graph is this?
Bar chart
Segmented bar graph
Histogram
Pie chart
50
If the mean of sampling distribution of sample means equals the population parameter, it is
unbiased
a statistic
skewed
biased
51
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
52
The Normal Curve follows
Central Limit Theorem
Fundamental Theorem of Stats
The 68-95-99.7 Rule
The best model
53
All of the following are types of graphs used to display quantitative data except
Pictogram
Timeplot
Stem and Leaf
Histogram
54
An LSRL is a good fit if a residual plot
Looks like a line
Is completely scattered
Looks exponential
Looks like a curve
55
Being an _____ means that it affects the slope
Noninfluential point
Unique point
Influential point
outlier
56
if I multiply each X by 100, add 12 to each y, and switch X and y, r
stays the same
decreases
changes
increases
57
What kind of data are SAT scores
Quantitative
Categorical
58
A 5 number summary is used for a
Histogram
Box plot
Bar Graph
Pie chart
59
The word "or" in a probability question signifies
Division
Addition
Subtraction
Multiplication
60
The first bulls eye is on the 3rd arrow
t-distribution
Binomial
Normal
Geometric
61
The group where no treatment is applied is called the
Treatment group
Control group
blocked group
Homogenous group
62
Any point that doesn't fit with the rest is called an
Gap
Outlier
Genius
Influential
63
The word "and" in a probability question signifies
Multiplication
Division
Addition
Subtraction
64
All of the following are types of quantitative data except
Distance
Zip codes
Height
Weight
65
What is the interquartile range?
Q4-Q3
Q3-Q1
Q2-Q4
Q2-Q1
66
Lying is a type of
Cluster sample
Response bias
No response bias
Mean act
67
Type of sample. Randomly select a department and survey all the people in it.
Systematic
SRS
Stratified
Cluster
68
If this point was removed from this association, would r increase or decrease?
Increase
Decrease
69
The association in this picture has a r of
-1
0
1
0.3
70
For a normal curve: ____% of data is within 2 Standard deviations of the mean.
95%
100%
68%
99.7%
71
The median is the
The center number when data is sorted
The average
The monkey in the middle
Middle number
72
If ___ ____ is done correctly, it can determine cause and effect.
An Experimen
Observational study
Response bias
A Stats simulation
73
For questions that give you a percenttile and have you find an X , we use
binomialpdf
Invnorm
normalcdf
geompdf
74
What results from samples that do not represent the population?
People are upset they were left out
Inaccurate numbers
Under coverage
Bias
75
If a population is not normal, __% of the population is within 1 standard deviation of the mean
cannot be determined
More than 68%
68%
95%
76
The proportion of times the outcome would occur for a large number of repetitions is called
An SRS
A simulation
Probability
The sampling distribution
77
This reduces variation and splits the subjects into homogenous groups.
Matching
Blinding
Blocking
Randomizing
78
A placebo is
Always given to the control group
A blind group
A fake treatment
A type of experiment
79
A z-score is
How far a statistic is from the median
very tired and sleepy
How far a statistic is from the mean
How many standard deviations a statistic is from the mean
80
What is the equation for LinReg?
Y-hat=mx+b
y-hat=a+bx
Ax+By-hat=C
Y-hat=X
81
Describe the shape of this distribution.
uniform
Unimodal and Symmetric
Bimodal
Skewed Right
82
The median of the probability distribution is:
1.5
1
2
3
83
The median of a density curve is the point where the curve
cannot be determined
cuts the data into two equal parts
would balance if it were a solid figure
is the midpoint of the min and max
84
A parameter is
A unit of stats
A number calculated from a population.
The distance around a shape.
A number calculated from a sample.

AP Stats Midterm Practice Flashcards | StudBud