Figure 10.6 is a pictogram. It is a bar graph in which pictures replace the bars. The graph is aimed at consumers shopping for a vacuum. It claims that a Dyson vacuum has more than twice the suction of any other vacuum. Although not clearly labeled, type of vacuum is shown along the x axis or horizontal axis, and the y axis or vertical axis, gives the calculated number of air watts for each vacuum. We see the Dyson vacuum (far right) has roughly 4 times the air watts (160 is roughly 4 times 43) of the vacuum on the far left. However, this graphic makes it appear as though there is a much larger difference. Why is this?

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160
160
Air Watts
140
120
100
80
68
Air Watts
60
43
Air Watts
40
20
Moore/Notz, Statistics: Concepts and Controversies,
10e, © 2020 W. H. Freeman and Company
Figure 10.6 Advertisement found on Dyson's website for vacuum cleaners claiming a Dyson vacuum
has more than twice the suction of any other vacuum, Example 5. (From For All Practical Purposes:
Mathematical Literacy in Today's World, 10e by COMAP. Copyright 2016 W.H. Freeman and Company.
All rights reserved. Used by permission of the publisher Macmillan Learning.)
To magnify a picture, the artist must increase both height and width to
avoid distortion of the image. By increasing both the height and width of
the Dyson vacuum, it appears to be 4 x 4 = 16 times larger. Remember a
bar graph should have bars of equal width-only the heights of the bars
should vary. Replacing the bars on a bar graph with pictures is tempting,
but it is difficult to keep the "bar" width equal without distorting the
picture.
Transcribed Image Text:160 160 Air Watts 140 120 100 80 68 Air Watts 60 43 Air Watts 40 20 Moore/Notz, Statistics: Concepts and Controversies, 10e, © 2020 W. H. Freeman and Company Figure 10.6 Advertisement found on Dyson's website for vacuum cleaners claiming a Dyson vacuum has more than twice the suction of any other vacuum, Example 5. (From For All Practical Purposes: Mathematical Literacy in Today's World, 10e by COMAP. Copyright 2016 W.H. Freeman and Company. All rights reserved. Used by permission of the publisher Macmillan Learning.) To magnify a picture, the artist must increase both height and width to avoid distortion of the image. By increasing both the height and width of the Dyson vacuum, it appears to be 4 x 4 = 16 times larger. Remember a bar graph should have bars of equal width-only the heights of the bars should vary. Replacing the bars on a bar graph with pictures is tempting, but it is difficult to keep the "bar" width equal without distorting the picture.
Figure 10.6 is a pictogram. It is a bar graph in which pictures replace the
bars. The graph is aimed at consumers shopping for a vacuum. It claims
that a Dyson vacuum has more than twice the suction of any other
vacuum. Although not clearly labeled, type of vacuum is shown along the x
axis or horizontal axis, and the y axis or vertical axis, gives the calculated
number of air watts for each vacuum. We see the Dyson vacuum (far right)
has roughly 4 times the air watts (160 is roughly 4 times 43) of the vacuum
on the far left. However, this graphic makes it appear as though there is a
much larger difference. Why is this?
Transcribed Image Text:Figure 10.6 is a pictogram. It is a bar graph in which pictures replace the bars. The graph is aimed at consumers shopping for a vacuum. It claims that a Dyson vacuum has more than twice the suction of any other vacuum. Although not clearly labeled, type of vacuum is shown along the x axis or horizontal axis, and the y axis or vertical axis, gives the calculated number of air watts for each vacuum. We see the Dyson vacuum (far right) has roughly 4 times the air watts (160 is roughly 4 times 43) of the vacuum on the far left. However, this graphic makes it appear as though there is a much larger difference. Why is this?
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