8.5 Double Box-and-Whisker Plots
8.5 Double Box-and-Whisker Plots
Here you’ll learn how to construct and interpret double box-and-whisker plots and use double box-and-whisker plots
to solve problems. You’ll also learn how to draw double box-and-whisker plots using Texas Instrument calculators.
A farmer is testing two new soil mixtures to see if his corn grows taller. He tests the two mixtures on similar patches
of land with 50 plants each and compares the results. How can he organize the data to see which mixture will achieve
the best results?
Watch This
First watch this video to learn about double box-and-whisker plots.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter8DoubleBoxandWhiskerPlotsA
Then watch this video to see some examples.
MEDIA
Click image to the left for more content.CK-12 Foundation: Chapter8DoubleBoxandWhiskerPlotsB
Guidance
Double box-and-whisker plotsgive you a quick visual comparison of 2 sets of data, as was also found with other
double graph forms covered in previous Concepts. The difference with double box-and-whisker plots is that you
are also able to quickly visually compare the means, the medians, the maximums (upper range), and the minimums
(lower range) of the data.
The double box-and-whisker plots in the first 2 examples were drawn using a program called Autograph. You can
also draw double box-and-whisker plots by hand using pencil and paper or by using your TI-84 calculator, as was
done in the third example.
Example A
Emma and Daniel are surveying the times it takes students to arrive at school from home. There are 2 main groups
of commuters who were in the survey. There were those who drove their own cars to school, and there were those
who took the school bus. Emma and Daniel collected the following data: