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Statistics - Chapter 1 review Flashcards | StudBud
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Statistics - Chapter 1 review
Statistics - Chapter 1 review
23 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
23 cards
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Practice quiz
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Questions
23
Answers
1
Which answer choice is not a component of the 5 number summary?
mean
median
Q3
minimum
2
What is the median of this stemplot? (n = 24)
65
68.5
65
72
3
What is the shape of this distribution?
skewed left
symmetrical
skewed right
bimodal
4
Which of the following is a categorical variable?
% of Students Taking AP Stats Test
Region of Country
SAT Math Scores
Population Counts of US Cities
5
What is the shape of this distribution?
skewed right
bimodal
symmetrical
unimodal
6
How many observations are contained in this Histogram?
16
14
Cannot be ascertained
18
7
Which one has the greater median?
mets
both
neither
phillies
8
How do you calculate mean?
largest number - smallest number
middle number
sum of observations / number of observations
sum of observations x number of observations
9
What is the probability of "A good chance"?
1421 divided by 4826
758 divided by 1421
663 divided by 1421
Not possible from information given
10
When is the mean greater than the median?
symmetrical
skewed left
skewed right
boxplot
11
What is the name of this graph?
bar graph
scatterplot
box plot
dot plot
12
As a percentage, females are more likely to have answered "Some chance, but probably not"
False
Cannot be calculated from existing data
True because 426/2367 > 286>2459
True because 426 > 286
13
How do you calculate standard deviation from a boxplot?
Q3 - Q1
the middle value
Q1 x Q3
you can't
14
Which of the following includes the actual numerical values of the distribution
Bar Graph
Histogram
Stemplot
Box Plots
15
A ? variable places an individual into one of several groups.
Lurking Variable
Procedural Variable
Categorical Variable
Numerical Variable
16
What is the median of this distribution?
2
Cannot be determined
3
2.5
17
What does SOCS stand for?
Shape, Outliers, Center, Spread
Skewedness, Outliers, Center, Standard deviation
correlation, degrees of freedom, p-value, z-score,
Symmetrical, Outliers, Center, Spread
18
How do you calculate the upper outlier range?
Q3 + (Q1 x 1.5)
Q3 x Q1
Q3 + (1.5 x IQR)
Q3 - Q1
19
What must you do when you compare distributions? (more than one answer)
write a lot
stick to numbers, don't compare
use comparison words AND use SOCS acronym
20
What is standard deviation?
typical distance of values in a distribution from the mean
not a measure of spread
measure of center
the variance squared
21
Given the young adult is female, find probability of "almost certain"?
486 divided by 1083
486 divided by 597
486 divided by 2367
Cannot be calculated from existing data
22
Which is best for describing the Center of a skewed distribution
Mean
Outliers
Median
Standard Deviation
23
What does Q1 mean?
approximately 100% of the data
approximately 50% of the data
approximately 25% of the data is below it
approximately 75% of the data is below it
