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AP Statistics - Chapter 1 - Ahrens Flashcards | StudBud
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AP Statistics - Chapter 1 - Ahrens
AP Statistics - Chapter 1 - Ahrens
25 terms
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StudBud Administration
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This Quiz is a solid review of Chapter 1 of The Practice of Statistics (Starnes, et al)
Flashcards
25 cards
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Practice quiz
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Questions
25
Answers
1
What Q1 mean?
approximately 50% of the data
approximately 25% of the data is below it
approximately 100% of the data
approximately 75% of the data is below it
2
How many observations are contained in this Histogram?
18
Cannot be ascertained
16
14
3
How do you calculate mean?
sum of observations x number of observations
largest number - smallest number
sum of observations / number of observations
middle number
4
When is the mean greater than the median?
skewed left
skewed right
symmetrical
boxplot
5
Which is best for describing the Center of a skewed distribution
Median
Standard Deviation
Outliers
Mean
6
What is the shape of this distribution?
unimodal
bimodal
symmetrical
skewed right
7
You would calculate the
Marginal Distribution
of "A Good Chance" using
758 divided by 1421
663 divided by 1421
Not possible from information given
1421 divided by 4826
8
Which of the following includes the actual numerical values of the distribution
Bar Graph
Box Plots
Histogram
Stemplot
9
Which answer choice is not a component of the 5 number summary?
Q3
minimum
median
mean
10
What is the median of this distribution?
2.5
3
Cannot be determined
2
11
What must you do when you compare distributions? (more than one answer)
use comparison words
write a lot
use the acronym SOCS
stick to numbers, don't compare
12
What does SOCS stand for?
Symmetrical, Outliers, Center, Spread
Skewedness, Outliers, Center, Standard deviation
Shape, Outliers, Center, Spread
correlation, degrees of freedom, p-value, z-score,
13
What is standard deviation?
the variance squared
typical distance of values in a distribution from the mean
not a measure of spread
measure of center
14
You would calculate the
Conditional Distribution
of Female and "Almost Certain" by
486 divided by 2367
486 divided by 597
486 divided by 1083
Cannot be calculated from existing data
15
As a percentage, females are more likely to have answered "Some chance, but probably not"
Cannot be calculated from existing data
True because 426 > 286
True because 426/2367 > 286>2459
False
16
How do you calculate standard deviation from a boxplot?
the middle value
Q1 x Q3
Q3 - Q1
you can't
17
Standard Deviation = ?
Sum of Squared Deviations
Variance Squared
Square Root of the Variance
Sum of Squared Deviations / n-1
18
What is the name of this graph?
bar graph
dot plot
scatterplot
box plot
19
Which one has the greater median?
neither
both
phillies
mets
20
How do you calculate the upper outlier range?
Q3 + (Q1 x 1.5)
Q3 + (1.5 x IQR)
Q3 - Q1
Q3 x Q1
21
What is the shape of this distribution?
symmetrical
bimodal
skewed right
skewed left
22
Which of the following is a categorical variable?
% of Students Taking AP Stats Test
Population Counts of US Cities
Region of Country
SAT Math Scores
23
A ? variable places an individual into one of several groups.
Numerical Variable
Procedural Variable
Lurking Variable
Categorical Variable
24
What is the median of this stemplot? (n = 24)
(65 + 65)/2
(65 + 72)/2
65
72
25
Select all answers that are
not
characteristics of Histograms
Good for visualizing individual data within a distribution
Allows you to easily see the mean of a data set
Allows one easily visualize the skewness of a distribution.
Good when analyzing large data sets
