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12.3 Box-and-Whisker Plots

12.3 Box-and-Whisker Plots. Objectives: Find the range, quartiles, and inter-quartile range for a data set. Make a box and-whisker plot for a data set. Standards: 2.6.8E Analyze and display data in box- and-whisker plots.

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12.3 Box-and-Whisker Plots

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  1. 12.3 Box-and-Whisker Plots Objectives: Find the range, quartiles, and inter-quartile range for a data set. Make a box and-whisker plot for a data set. Standards: 2.6.8E Analyze and display data in box- and-whisker plots.

  2. These five values are referred to collectively as the “five point summary” for the data set.

  3. Find the 5 point summary and the IQR for the data set below. Identify any outliers. TRY THIS: min = 2 Q1 = 10 median = 33.5 Q3 = 51 max = 83 IQR = 41 Low Outliers? Q1 – 1.5(IQR) = 10 – 1.5(41) = 10 – 61.5 = -51.5 No values below -51.5 No low outliers High Outliers? Q3 + 1.5(IQR) = 51 + 1.5(41) = 51 + 61.5 = 112.5 No values above 112.5 No high outliers

  4. Making a Box-and-Whisker on a Piece of Paper:

  5. Page 786: Do #7 & 8

  6. Homework • pg. 786 # 15-22, 27-29 • ANOTHER EXTRA CREDIT OPPORTUNITY!! • p 786 # 23 – due Friday • Quiz TOMORROW on 12.1 – 12.3 • Optional Homework – worth 10 points if handed in tomorrow ~ 12-3 practice (front and back)

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