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Stem and Leaf Plots

Stem and Leaf Plots. OBJ: • To display a set of data using a stem -and-leaf plot and to find the mean, median, and mode. Shown below are the mathematics scores for the 50 seniors in a Midwestern high school who took a standardized achievement test. In a stem -and-leaf plot the first

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Stem and Leaf Plots

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  1. Stem and Leaf Plots OBJ: • To display a set of data using a stem-and-leaf plot and to find the mean, median, and mode

  2. Shown below are the mathematics scores for the 50 seniors in a Midwestern high school who took a standardized achievement test.

  3. In a stem-and-leaf plot the first digit of each score is called the stem and the second digit is called the leaf. All the leaves for a given stem are written one after the other. Make a stem-and-leaf plot to the right with the scores recorded by column.

  4. Unorganized Stem and Leaf

  5. Stem Leaf

  6. Make a second stem-and-leaf plot to the right with the scores rearranged in increasing order.

  7. StemLeaves 3|2 represents a score of 320

  8. DEF: • mean The sum of the data divided by the total number of data items (average) 27,480 50 550

  9. DEF: • median The middle number of the data when it is arranged in numerical order, or the average of the two middle numbers if there is an even number of data items 520 + 530 2 525

  10. DEF: • mode Data item that occurs the most 510

  11. The 12 National League baseball teams had shutouts for one season as shown below:

  12. The 12 National League baseball teams had shutouts for one season as shown below:

  13. The 12 National League baseball teams had shutouts for one season as shown below:

  14. 4 + 6 + 9 + 10 + 11 + 12 + 13 + 13 + 14 + 15 + 22 + 24 = 153 Mean = 153 12 = 12.75 Median = 12 + 13 2 = 12.5 Mode = 13 All homework in Advanced Math Book HW 1 P 643-644 (1-8) b. Find the mean, median, and mode.

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