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7th Grade Math / Lesson 4: Stem and Leaf Plots

STEM AND LEAF PLOTS
What will we be learning in this lesson?


  • In this lesson you will learn how to make stem and leaf plots to display data.
Vocabulary words are found in this purple color throughout the lesson. Remember to put these in your notebook.


STEM AND LEAF PLOTS


  • A stem and leaf plot looks like this



    According to this stem and leaf plot, our data values are 40, 42, 45, 51, 53, 66, 67, 68, 68, and 72


STEM AND LEAF PLOTS


  • To create a stem and leaf plot you must separate the ones digits from the rest of the number.
  • Which value is in the ones place for the following number? 5,678
  • It is the 8. The number right before the decimal point is the ones digit. (The number in the ones place)
  • All of the numbers in the ones place from your set of data become the leaves in the stem and leaf plot. All of the numbers in front of the ones place become the stems.


STEM AND LEAF PLOTS


  • Use the following data to create a stem and leaf plot

    34     45     35     58     32     43     44     72
    46     35     56     53     73     48     41     30

    Since these are two digit numbers, figure out the highest and lowest tens value. lowest is 3 for 30, highest if 7 for 73. So the stems will range from 3 to 7.


    You need to include the six even though we do not have any numbers in the sixties. The stems must go in order.


STEM AND LEAF PLOTS


34     45     35     58     32     43     44     72
46     35     56     53     73     48     41     30

Now place the leaves in across from the appropriate stem. Leaves must be arranged in numerical order - from lowest to highest.

You must include a key for you stem and leaf plot explaining how to read the numbers


  • Can you create a stem and leaf plot for a set of data?
  • Can you answer questions about the information given in a stem and leaf plot?
  • Go back to the classroom to get to your homework and any other items you need to attend to.