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AP Stats Unit 1-5 Review Flashcards | StudBud
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AP Stats Unit 1-5 Review
AP Stats Unit 1-5 Review
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1
How can you make a confidence interval narrower?
increase confidence level
increase sample size
decrease sample size
decrease population size
2
Mutually exclusive events are events that:
Understand each other well
Exclusive mutually
Cannot be possible at the same time
Are not dating other sets of data
3
To reduce the variability of the sampling distribution, __________ the _________________.
increase, sample size
decrease, sample size
decrease, bias
increase, bias
4
The sampling distribution of p hat is approximately Normal because:
10% condition (to make sure samples are independent).
Large Counts Condition is met: n*p ≥10 and n (1-p)≥10
It is RANDOM
Just kidding, it's never Normal
5
A sampling distribution of a statistic is the distribution of
all possible samples of the same size of the same population
all possible samples from all possible poulations
probabilities of obtaining a statistic from repeated samples
the variability of the samples centered around the std. dev.
6
Which is
not
a condition for making confidence intervals about difference in proportions?
Random
10%
Sample Size Greater than 30
Large Counts
7
Conditional probability equation
P(B)=P(A)
P(A|B) = P(A ∩ B)/P(B)
P(A | B) = P(B)
P(A U B) = P(A ∩ B)/P(A)
8
The large counts condition is needed to make sure that _____________________________________.
we can make inference regarding the larger population
a sampling distribution is approximately normal
individual observations are independent
9
Trivia! The planet, Saturn, could float in water.
True
False
10
The width of a confidence interval ? as the confidence level increases.
Increases
Decreases
11
Trivia: Which number cannot be represented by a Roman numeral?
801
70
0
1000
12
An advantage of stratified sampling is that
It produces a representative sample
Its cheap
It incorporates all subgroups of cultures
It can be used with random and systematic sampling
13
Suppose a p-value was 3%, interpret this value.
The athlete would be successful 3% of the time
The athlete was 3% better in one context
3% of trials were at least as extreme as the test statistic
14
Dependent or Independent
Independent
Dependent
15
Movie trivia: What movie was the first to have a toilet flush?
Scream
13 Going on 30
Psycho
Forrest Gump
16
Conditional Probability
3/4
1/2
5/6
not enough info
17
The sampling distribution of a sample proportion is ______ approximately normal.
Always
Sometimes
Never
18
What does FUDS stand for?
froggy, umbrella, dimple, staples
from, unusual features, directon, strongness
form, usual gaps, describing, strong
form, unusual features, direction, strength
19
Find the 5 Number Summary of the Data Set:
Min: 11, Q1: 21, Med: 17, Q3: 16, Max: 21
Min: 18, Q1: 17, Med: 15, Q3: 19, Max: 17
Min: 11, Q2: 18, Max: 21
Min: 11, Q1: 16, Med: 18, Q3: 21, Max: 21
20
What does this residual plot tell you?
There is no correlation
Correlation is equal to causation
A linear model is appropriate for the data
A linear model is not appropriate for the data
21
Speed Trivia: How many edges does a cube have?
14
12
10
8
22
If we were to build 10,000 different 90% confidence intervals:
Approximately 1,000 of them would not include the unknown μ
Approximately 100 of them would not include the unknown μ
Approximately 900 of them would include the unknown μ
Approximately 90 of them would include the unknown μ
23
In Confidence Intervals, which of the following will result in a smaller Margin of Error?
A smaller sample mean
A larger population size
A smaller sample size
A smaller confidence level
24
Confidence intervals are meant to do what?
Identify if a sample mean matches the population mean.
Is an interval that can reasonably capture the parameter.
Show that X% of the data fall within a specified range.
Match exactly with the parameter of a given population.
25
What does CUSS stand for?
Center, unusual, shape, spread
Center, shape, spread
Centroid, unusual, shape, spread
Center, unique, spread, skewed
26
The spread of a sampling distribution is the ______________ of the statistic.
variability
bias
unbiased estimator
range
27
SPEED TRIVIA: Who painted the Mona Lisa?
Pablo Picasso
Salvador Dali
Leonardo da Vinci
Vincent van Gogh
28
Geometric or Binomial?
Geometric
Binomial
29
nonresponse bias is when...
trying to ask a HHS senior about what nonresponse bias is
the person conducting survey does not respond to your emails
randomly selected person does not answer or is unavailable
trying to survey someone from 1776
30
What is a residual
The correlation coefficient
Distance between a data point and the regression line
A linear regression line
A non-linear regression line
31
Flamingo Trivia #1 - How do flamingos get their pink color?
Spray paint
The hot temperatures of their habitats
Through the food they eat
Exposure to sunlight
32
What are the three most common confidence intervals?
80%, 90%, 100%
90%, 95%, 99%
68%, 95%, 99.7%
0%, 50%, 100%
33
What is the 5 Number Summary?
Q1, Q2, Q3, Q4, Q5
Minimum, Q1, Median, Q3, Maximum
Minimum, Mean, Median, Mode, Maximum
Minimum, Q2, Median, Q4, Maximum
34
Why would a randomized block design be used?
There is chance variation within the sample
So that random assignment can be done
To reduce the effect of variation among the subjects
So treatment can be administered
35
Identify the formula shown
Quadratic Formula
Vertex Form
Standard Form
Discriminant
36
Select all sample sizes and proportions that fulfill the large counts condition.
n=30 and p=0.37
n=30 and p=0.20
n=19 and p=0.50
n=30 and p=0.08
37
What is the difference between parameters and statistics?
parameters are exact, statistics not
parameters from the population, statistics from the sample
parameters from sample, statistics from the population
parameters not exact, statistics are exact
38
Confidence Interval or Hypothesis Test?
Confidence Interval
Hypothesis Test
39
In general a positive residual is an
Underestimate
Overestimate
Outlier
mistake
40
Interpret a p-value...
Prob. of getting result observed or one more extreme
Prob. of getting result observed or one more extreme if Ho is true
The probabiity of getting the result we observed
The probability that Ho is true
41
Binomial or Geometric?
This represents a geomtric setting
This represents a binmial setting
42
Which formula to determine SPREAD of Sampling Distribution?
σ_{p-hat}=\sqrt{\frac{p\left(1-p\right)}{n}}
σ_{\overline{x}}=\frac{σ}{\sqrt{n}}
43
An _______has the population parameter as the mean/center of its sampling distribution.
inference
unbiased estimator
educated guess
estuary
44
Confidence Interval or Hypothesis Test?
Confidence Interval
Hypothesis Test
45
Trivia: Which mammal has no vocal cords?
Sloths
Elephants
Giraffes
Zebras
46
A residual can be calculated as...
observed y/predicted y
observed y-predicted y
predicted y-observed y
precited y/observed y
47
Which formula to determine SPREAD of Sampling Distribution?
σ_{p-hat}=\sqrt{\frac{p\left(1-p\right)}{n}}
σ_{\overline{x}}=\frac{σ}{\sqrt{n}}
48
The mean of the sampling distribution of a sample proportion is...
p
p-hat
μ (p)
μ
