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Getting the Day Started - Dot Plot vs. Whisker Plot

Objective: Students will give personal data and learn how to record their data as a dot plot and a box and whisker plot.  They will also learn how to enter their data into a calculator list, retrieve statistical data from the calculator, and make a box and whisker plot on the calculator.  Students will also be able to compare and contrast the difference between the two plots.

Day One
  1. Students will be the day before to take note of the number of minutes from the time that they wake up until they arrive at school.

  2. The teacher should record the data in the front of the room in an organized manner.
Dot Plot
  1. Students may work in groups of 2; however, each student should produce their own graph.
  2. Students will start first with a dot plot.  They must decide on an appropriate interval, and will make the plot with the teacher’s guidance.
  3. The students need to answer the following questions from the graph
    1. Circle the minimum value on your graph.
    2. Circle the maximum value on your graph.
    3. Find the range of the data.
    4. Count your data pieces on your graph and find the data piece that is in the middle and circle. This is the median.
    5. Are any of your columns taller than the rest?
    6. Draw a box around the tallest column or columns. This is your mode.
Box Plot
  1. Use your dot plot to help you find the five number summary.

    MinimumQuartile 1MedianQuartile 3Maximum
         


  2. Each student can make the box and whisker plot with the teacher’s guidance.
  3. The students need to answer the following questions from the graph.
    1. Is each piece of data pictured on this graph?
    2. Explain if you can easily find the range of the data on this graph.
    3. What percent of the data falls to the left of the median?
    4. What percent of the data falls to the right of the median?
    5. What percent of the data is in the entire box of the graph?
    6. What percent of the data falls between the minimum and quartile 1?
    7. What percent of the data falls between the minimum and quartile 3?
Day 2 -  Entering the data into a list, retrieving the five number summary from the calculator, and making a box and whisker plot on the graphing calculator.

  1. Enter the data from the previous day into list one of your calculator. For assistance, you may want to reference our calculator lesson on Data Input.
  2. Get the statistic on one-variable statistics from your calculator. For assistance, you may want to reference our calculator lesson on Variable Statistics.
  3. Find the five number summary and compare to your work from yesterday.
    _________ _________ _________ _________ _________
  4. Have your calculator make a box and whisker plot. (calculator lesson on graphing and setting a window)
  5. Use the TRACE function on your calculator on your calculator and note the five number summary.
  6. Compare your hand drawn graph from yesterday with the calculator’s graph.
  7. Compare and contrast the dot plot and the box and whisker graph.



C Gulliksen
C Adams

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