To compare two groups graphically, one can use the same stems for each and put leaves for one group on one side and for the other group on the other side. This is called a back-to back stem-and-leaf plot. The figure shown compares sugar amounts (expressed in milligrams) for cereals listed in the table according to whether they were intended for adults or children.

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a. Is the distribution of sugar values similar or different for the two cereal types? If they are different, describe the difference.
b. Construct a back-to-back stem-and-leaf plot for the sodium values, listed in Table 2.3. Is the distribution of sodium values similar, or different, for the two cereal types?

Back-to-Back Stem-and-Leaf Plot of Sugar for Adult and Children Cereals Adult Children 0 [000 100 0 200 0 3000 0 0 400 0 500 600 0 0 700 800 900 0 1000 0 0 1100 0 1200 0 0 1300 1400 0 0 0 1500 0 1600 1700 0 1800 Cereal Type ugar (mg) Frosted Mini Wheats Raisin Bran All Bran Apple Jacks Cap'n Crunch Cheerios Cinnamon Toast Crunch Crackling Oat Bran Fiber One Frosted Flakes Froot Loops Honey Bunches of Oats Honey Nut Cheerios Life Rice Krispies Honey Smacks Special K Wheaties Corn Flakes Honeycomb 11,000 18,000 5000 14.000 12.000 1000 10.000 16,000 12.,000 14.000 7000 9000 6000 3000 15,000 4000 4000 3000