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Chapter 4
Describing
Numerical
Data
Active Learning Lecture Slides
For use with Classroom Response Systems
Copyright © 2014, 2011 Pearson Education, Inc.
1
The median is what percentile?
A. 25th
B. 50th
C. 75th
D. 100th
Copyright © 2014, 2011 Pearson Education, Inc.
2
The median is what percentile?
A. 25th
B. 50th
C. 75th
D. 100th
Copyright © 2014, 2011 Pearson Education, Inc.
3
The lower quartile is what percentile?
A. 25th
B. 50th
C. 75th
D. 100th
Copyright © 2014, 2011 Pearson Education, Inc.
4
The lower quartile is what percentile?
A. 25th
B. 50th
C. 75th
D. 100th
Copyright © 2014, 2011 Pearson Education, Inc.
5
The upper quartile is what percentile?
A. 25th
B. 50th
C. 75th
D. 100th
Copyright © 2014, 2011 Pearson Education, Inc.
6
The upper quartile is what percentile?
A. 25th
B. 50th
C. 75th
D. 100th
Copyright © 2014, 2011 Pearson Education, Inc.
7
The interquartile range is the…
A. difference between its minimum and
maximum values.
B. difference between the mean and median.
C. distance between the mean and median.
D. distance from the lower quartile to the
upper quartile.
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8
The interquartile range is the…
A. difference between its minimum and
maximum values.
B. difference between the mean and median.
C. distance between the mean and median.
D. distance from the lower quartile to the
upper quartile.
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9
The range is the…
A. difference between its minimum and
maximum values.
B. difference between the mean and median.
C. distance between the mean and median.
D. distance from the lower quartile to the
upper quartile.
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10
The range is the…
A. difference between its minimum and
maximum values.
B. difference between the mean and median.
C. distance between the mean and median.
D. distance from the lower quartile to the
upper quartile.
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11
The mean is the…
A. label of the category of the middle observation
when you sort the values.
B. sum of the data values divided by the number of
data values.
C. most common category.
D. difference between its minimum and maximum
values.
Copyright © 2014, 2011 Pearson Education, Inc.
12
The mean is the…
A. label of the category of the middle observation
when you sort the values.
B. sum of the data values divided by the number of
data values.
C. most common category.
D. difference between its minimum and maximum
values.
Copyright © 2014, 2011 Pearson Education, Inc.
13
Which of the following are measures of the
spread of a distribution (circle all that apply):
I. Mean
II. Variance
III. Standard deviation
IV. Median
A. II only
B. III only
C. I and IV
D. II and III
Copyright © 2014, 2011 Pearson Education, Inc.
14
Which of the following are measures of the
spread of a distribution (circle all that apply):
I. Mean
II. Variance
III. Standard deviation
IV. Median
A. II only
B. III only
C. I and IV
D. II and III
Copyright © 2014, 2011 Pearson Education, Inc.
15
The most common plot of the distribution of
a numerical variable is a…
A. pie chart.
B. bar chart.
C. boxplot.
D. histogram.
Copyright © 2014, 2011 Pearson Education, Inc.
16
The most common plot of the distribution of
a numerical variable is a…
A. pie chart.
B. bar chart.
C. boxplot.
D. histogram.
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17
A value that lies very far away from the
majority of the other values is…
A. the mode.
B. the variance.
C. an outlier.
D. the range.
Copyright © 2014, 2011 Pearson Education, Inc.
18
A value that lies very far away from the
majority of the other values is…
A. the mode.
B. the variance.
C. an outlier.
D. the range.
Copyright © 2014, 2011 Pearson Education, Inc.
19
A graphical summary of a numerical variable
that shows the five-number summary of a
variable is a…
A. boxplot.
B. histogram.
C. bar chart.
D. pie chart.
Copyright © 2014, 2011 Pearson Education, Inc.
20
A graphical summary of a numerical variable
that shows the five-number summary of a
variable is a…
A. boxplot.
B. histogram.
C. bar chart.
D. pie chart.
Copyright © 2014, 2011 Pearson Education, Inc.
21
The shape of the graph is…
A. symmetric.
B. skewed right.
C. skewed left.
D. unimodal.
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22
The shape of the graph is…
A. symmetric.
B. skewed right.
C. skewed left.
D. unimodal.
Copyright © 2014, 2011 Pearson Education, Inc.
23
The shape of the graph is…
A. symmetric.
B. skewed right.
C. skewed left.
D. unimodal.
Copyright © 2014, 2011 Pearson Education, Inc.
24
The shape of the graph is…
A. symmetric.
B. skewed right.
C. skewed left.
D. unimodal.
Copyright © 2014, 2011 Pearson Education, Inc.
25
The empirical rule states that…
A. about 68% of the data lie with in one
standard deviation of the mean.
B. about 95% of the data lie with in two
standard deviations of the mean.
C. almost all the data lie within three
standard deviations of the mean.
D. all of the above.
Copyright © 2014, 2011 Pearson Education, Inc.
26
The empirical rule states that…
A. about 68% of the data lie with in one
standard deviation of the mean.
B. about 95% of the data lie with in two
standard deviations of the mean.
C. almost all the data lie within three
standard deviations of the mean.
D. all of the above.
Copyright © 2014, 2011 Pearson Education, Inc.
27