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AP Statistics Review
AP Statistics Review
50 terms
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StudBud Administration
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An in-depth review of material that you need to know for Ms. Beasley's class
Flashcards
50 cards
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Practice quiz
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Host live
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Questions
50
Answers
1
If P(Mango on a banana tree)=0.1 what is the probability of getting 2 mangoes on a banana tree?
0.1 x 0.1
0.01
0.1 x .01
0.1 / 0.1
2
What does r
2
represent in a scatterplot?
The coefficient of determination
How well the data fits to the linear regression line
Correlation coefficient
When two people name Robert are in a scatterplot
3
What is the probability that a coin lands on heads three times in a row?
01.25
0.25
0.5
0.125
4
What is the shape of this distribution?
Skewed left
T-distribution
Tall distribution
Normal distribution
5
In which situation could statistics be used to solve the problem?
You want to prompose to a girl with 95% confidence
You are getting a bad grade in a statistics class
Bullies keep eating your food
Find how many of your customers are using water cups for pop
6
How do you calculate the range?
Max - Q1
Max - Q3
Max - Min
Q3 - Min
7
In a skewed right distribution
The mean and median are the same
The mean is greater than the median
This cannot be determined with the information given
The mean is less than the median
8
When happens when you increase α?
Probability of a Type I decreases
Power decreases
Probability of a Type II increases
Probability of a Type I increases
9
What can be defined as the 50th percentile?
Mean
Median
This is a dumb question
Q3
10
What is the acronym for the description of a distribution?
SOCS
SOCK
SOCKS
SOC
11
What is the acronym for the requirements of a t test for the slope of a linear regression line?
LINER
STR8
LINEAR
RINSE
12
Who is Ms. Beasley's favorite student?
Ian
Noah Helber
Literally anybody but Jack
Jack
13
What is the p-value?
Just a value with no meaning
The probability of getting a result as or more extreme
The power of the test
The effect of the test
14
Which of the following is not a condition check for a one-sample z test?
It is a linear distribution
The distribution of the data is approximately normal shaped
The sampling was randomized
Everything is greater than the value of 30
15
How do you calculate IQR?
Q1 - Q3
Q2 - Q1
Q1 + Q3
Q3 - Q1
16
What is another word for Mutually Exclusive?
Exclusive
Independent
Impossible
Disjoint
17
What is the symbol pictured?
Confidence Interval
Level of Significance
0.05
Alfa
18
What school does Ms. Beasley coach volleyball at?
Skyline
Manchester
Saline
Milan
19
In what statistical notation is the symbol (θ) used in?
The null hypothesis
It is in the formula for r2
You can use it instead of 0
The alternative hypothesis
20
If you have a p-value of 0.05 and a alpha level of 0.05, what do you do?
Fail to reject the H0
Fail to reject the Ha
Reject the H0
Accept the H0
21
In an experimental design, why would you use blinding?
To reduce bias
To make people blind, classic
To increase variability
So that you can't see the results
22
How do you calculate residuals?
x - y
µ - y
y - ŷ
ß - µ
23
Which of the following is resistant to outliers?
Median
Mean
Max
IQR
24
Why is the central limit theorem important?
To tell if the distribution is normal
To tell if the distribution is linear
So you can find the mean of a data set
The center of the Earth was colonized by Brendan Frazier
25
Who is the author of The Practice of Statistics?
Starnes
Moore
Yates
Tabor
26
What is the difference between an experiment and a study?
An experiment induces treatments and a study does not
An experiment requires you to wear a fancy lab coat
A study induces treatments and an experiment does not
There are no differences
27
Was the last question a dumb question?
No
Yes
28
If there are 25 marbles in a bag and 10 are red, what is the chance that you will get a red?
2/5
10/2.5
1.0/25
5/1.25
29
What is the probability of the sample space?
Not possible
.9
.5
1
30
What is the definition of a biased sample?
If it produces mangos on a banana tree
If it produces a sample that is skewed left
If it produces samples that do not represent the population
If it produces samples that do represent the population
31
Is statistics an important class?
It's not; statistics is guesswork
It's not; you will never use this stuff again
It is; you will use this stuff again
It is; statistics is concrete evidence in problem solving
32
Mrs. Beasley's room number is
333
317
319
345
33
When testing for an association between two variables, which test do you use?
Two sample Z-test for association
Chi-Squared test for homogeneity
Chi-Squared test for independence
T-test for proportions
34
If events A and B are mutually exclusive then
They are dependent
They can both happen at the same time
They are independent
They cannot happen at the same time
35
What makes the margin of error smaller?
I'm done with this kahoot
Smaller sample size
A larger confidence level
Larger sample size
36
How would you describe this distribution?
Unimodal
Right Skewed
Normal
Bimodal
37
What is the formula for expected counts in a chi-squared test?
EC= ((Column Total) x (Row Total)) / Grand Total
EC= ((Row Total) x (Column Total)) / Row Total
EC= ((Row Total) / (Column Total)) x Grand Total
EC= ((Row Total) x (Column Total)) / 2 x Grand Total
38
The chi-square formula changes for every kind of chi-square test
False
True
39
Which sampling method reduces variability the most?
Systematic Sampling
Convenience Sampling
Random Sampling
Stratified Sampling
40
What is the symbol for beta?
υ
β
θ
α
41
What is the one word to remember about t-distributions?
Huge
Robust
Narrow
Weak
42
How do you calculate degrees of freedom in t-distributions?
n-1
(# of rows) x (# of columns)
n-2
n - 1000
43
What percent of the distribution is within 1 standard deviation of the mean?
99%
50%
75%
68%
44
The Practice of Statistics 5th Edition costs how much on Amazon?
$500
$145.27
$97
$9
45
If it rains 30% of the year, how many days could you expect rain during the month of February?
8.4
9.125
You can't make this conclusion
8.7
46
What is an outlier?
A point with a large residual
A point that stands out in the data
Outliers don't exist
A point that looks funny
47
What is a Type I error?
It's impossible to make a Type I error
We accept both hypotheses
When we fail to reject Ho when we should
When we reject Ho but it's true
48
If you increase n
The power of the test decreases
The probability of a Type I error increases
The probability of a Type I error stays the same
The probability of a Type II error increases
49
What is the Chi-Squared formula?
Ʃ((Observed-expected)2/Observed)
Ʃ((Observed-expected)/Expected)
Ʃ((Observed-expected)/Observed)
Ʃ((Observed-expected)2/Expected)
50
What is the formula for finding the probability of event A given that event B is true?
p=(A U B)/ B
p=(A ∩ B)/ A
p=(A U B)/ (Z* x B)
p=(A ∩ B)/ B
