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Graphing

Stem and Leaf Displays

Answers


  1. False: Stem and leaf displays can be unwieldy with large amounts of data because every single data value is shown in the figure.

  2. 132: The highest value is 132. You multiply the stem by 10 and add the leaf. For the highest value, this is (10)(13)+2.

  3. 4: There are four scores with a stem of four: 44, 47, 48, and 49.

  4. 6: The stems are multiplied by one, so the highest is (1)(6)+0.0.

  5. The stems are multiplied by one, so the lowest is (1)(-2) - 0.8. Note that with negative stems, the leaves are subtracted.

  6. True: Back-to-back stem and leaf displays are good for comparing two groups.

  7. False: Stem and leaf displays are not well suited for comparing three or more groups.