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17 questions
Which summary statistics should be used to describe the given data?
the mean and standard deviation
the mean and IQR
the median and standard deviation
the median and IQR
Standard deviation is a measure of
spread
center
shape
outliers
Which best describes the shape of the histogram?
uniform
unimodal
bimodal
skewed right
Which of the following are true about the IQR? Check all that apply.
IQR = Q3 - Q1
IQR = Q1 - Q3
The IQR is the middle 50% of a distribution
IQR stands for interquartile range
The IQR is the width of the box in a boxplot
Which of the numbers below is NOT part of a 5 number summary used to create a boxplot?
minimum
first quartile
mean
third quartile
maximum
How do you determine if a data value is an outlier? Check all that apply.
Q1 - 1.5IQR
Q1 + 1.5IQR
Q3 - 1.5IQR
Q3 + 1.5IQR
Which of the following measures is affected by addition/subtraction? Check all that apply.
mean
median
standard deviation
range
Q1
Which of the following measures is affected by multiplication/division? Check all that apply.
mean
median
standard deviation
range
Q1
Which of the following are things to discuss when describing a distribution (histogram, stemplot, boxplot, dotplot, etc.)? Check all that apply
Shape
Outliers
Center
Spread
Which of the following do you NOT use to describe a scatterplot?
Form
Direction
Spread
Unusual Features
Strength
What number describes the percent of the variation in the response variable that is explained by the explanatory variable.
correlation
residual
coefficient of determination
predicted value
What is a residual?
making predictions outside of the range of the data
the percent of the variation in y that is explained by x
a number that describes the strength of a linear relationship
the difference between the observed and predicted values
The ______________ of a variable tells what values that variable takes and how often it takes them
data
distribution
statistics
graph
When a distribution is skewed to the left, ...
the mean is less than the median
the mean is greater than the median
the median is less than the mean
the mean and median are approximately equal
The _________ is the midpoint of the data.
median
mean
mode
standard deviation
A ________ is a graphical display of the five number summary.
stemplot
histogram
dotplot
boxplot
Which of the following graphs is appropriate to display categorical data? Check all that apply.
histogram
pie chart
segmented bar chart
boxplot
stemplot
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