Name: Period: Date: Stem And Leaf Plots

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Name: Period: Date:Stem and Leaf Plots Guided NotesA stem and leaf plot uses the digits of data values to organize a data set. Stem and leaf plots have dataplaced into order from lowest to highest. The stem and leaf plot shows how data are distributed.Each data is broken into a stem (digit or digits on the left of the vertical line) and leaf (digit or digits on theright of the vertical line). The stems all represent tens place in stem and leaf plot. The leaves all representones place in stem and leaf plot.Use the following steps to construct a stem and leaf plot:Step 1: Order the data from least to greatest.Step 2: Identify the stems and leaves.Step 3: Order the stems from least to greatest.Step 4: Write the leaves next to their stems.Step 5: Order the leaves from least to greatest.Step 6: Write the key. The key explains what the stems and leaves represent.Sample Problem 1: Make a stem and leaf plot to display the data.a.The data below show the test scores for one student during a semester.75 82 54 64 54 78 84 92 65Copyright PreAlgebraCoach.com1

Name: Period: Date:Stem and Leaf Plots Guided Notesb.3.1 1.2 2.2 5.4 2.7 1.1 3.5 3.9 2.4 5.8c.220 220 200 320 260 250 340 370 110Copyright PreAlgebraCoach.com2

Name: Period: Date:Stem and Leaf Plots Guided NotesSample Problem 2: List the data given by the stem-and-leaf plot.a.b.c.StemLeaf1002163114423358Stem4Key: 1 0 means 10Leaf5126157012802698Stem87Key: 5 1 means 5.1Leaf314156027895Copyright PreAlgebraCoach.com67Key: 6 0 means 6003

Name: Period: Date:Stem and Leaf Plots Guided NotesInterpret Stem and Leaf PlotsSample Problem 3: Use the stem and leaf plot to find the data and answer the questions.a.The stem and leaf plot shows daily low temperatures (F )StemLeaf1562153067Key: 1 5 means 15 F Make an ordered list of the 7 values.Find least value, greatest value, mean, median, mode and range.What interval includes the most data?Making a Back-to-Back Stem and Leaf PlotThe back-to-back stem and leaf plots are used to compare two distributions side-by-side. Thistype of back-to-back stem and leaf plot contains three columns, each separated by a verticalline.The center column contains the stems.The first and third columns each contain the leaves of a different distribution. The numbers forthe leaves of the distribution in the left most columns are aligned to the right and are listed inorder.Copyright PreAlgebraCoach.com4

Name: Period: Date:Stem and Leaf Plots Guided NotesSample Problem 4: Make a back-to-back stem and leaf plot and answer the question.a.The data below show times, in minutes, those two friends spent online in the last week.John: 35 2630 48 56 13 38Michael: 46 1516 10 44 49 32a) Who spent the most time online in the last week?Copyright PreAlgebraCoach.com5

Interpret Stem and Leaf Plots Sample Problem 3: Use the stem and leaf plot to find the data and answer the questions. Making a Back-to-Back Stem and Leaf Plot The back-to-back stem and leaf plots are used to compare two distributions side-by-side. This type of back-to-back stem and leaf plot contains three columns, each separated by a vertical .

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