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Stem and Leaf Plot
A stem and leaf plot shows the shape of a set of data. That makes it easy to find the median, or middle number. Half of the data are below the median and half of the data are above the median.
Mrs. Lewis and Miss Laws math class took a math test on subtraction. Their scores are listed below.
97 98 89 91 101 99 103 93 90 102 98 90
103 85 100 79 101 92 80 98 82 98 77
1. First, organize the data. On another piece of paper, write the grades in order from highest to lowest.
2. Then fill in the grades on the stem and leaf plot below.
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1. How many students got a 90 % or A on the test? ________________________
2. What was the highest score? ____________ the lowest? ________________
3. What is the range of grades? ______________________________________
4. What is the median, or middle number? ______________________________
5. How many students got exactly a 98% on their test? ____________________
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