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.

5. TRY THIS: Find the 5 point summary and the IQR for the data set below. Identify any outliers. 47931342353724343150 1133362813525760697883 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

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

7. Page 786: Do #7 & 8

10. 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)