8.5. Double Box-and-Whisker Plots http://www.ck12.org
2 months. Knowing that the participants of the survey had cholesterol levels between 8 and 10 before beginning the
study, it appears that Vitamin Y had a bigger impact on lowering the cholesterol levels. The range for the cholesterol
levels for people taking Vitamin X was 10− 5. 2 = 4 .8 points, while the range for the cholesterol levels for people
taking Vitamin Y was 8− 3. 1 = 4 .9 points. Therefore, the range is not useful in making any conclusions.
Example C
Draw the double box-and-whisker plots in Example B using the TI-84 calculator.
Follow the key sequence below to draw the double box-and-whisker plots:
After entering the data into L1 and L2, the next step is to graph the data by using STAT PLOT.
The resulting graph looks like the following:
You can then press
TRACE