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# 1.1b Box & Whisker Plots

## on Aug 26, 2008

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## 1.1b Box & Whisker PlotsPresentation Transcript

• Chapter 1 Bitsy Griffin
• Minimum (min)
• Maximum (max)
• Median (med AND Q2)
• Quartiles (Q1, Q3)
• Interquartile Range
• Range
Chapter 1 Bitsy Griffin
• Definition
• Picture of how data is clustered without showing every value
• Information needed
• Minimum, Maximum AND Quartiles
• Use your calculator to find these
Chapter 1 Bitsy Griffin
• Draw a number line with EQUAL intervals & evenly spaced.
• Range on the number line should be a little larger than minimum and maximum.
Chapter 1 Bitsy Griffin
• Leave space above the number line for the box.
• Above the line, use points to mark the min, Q1, med/Q2, Q3, and max.
• Draw the box and whiskers using the points as a guide.
Chapter 1 Bitsy Griffin
• Weekly hours spent on homework
• Our data:
• Min 6 , Max 16, Med 10, Q1 7.5, Q3 12
• What range and intervals should be used on the number line?
Chapter 1 Bitsy Griffin
• Mark min, max, med, Q1, Q3
• Draw Box & Whisker
Chapter 1 Bitsy Griffin
• What’s the minimum?
• What is the maximum?
• What’s the range?
• What is the interquartile range?
Chapter 1 Bitsy Griffin
• 45, 37, 33, 16, 14, 11, 12, 8, 7, 13, 3, 5, 6, 3, 6, 4
Chapter 1 Bitsy Griffin
• 15.7, 18, 10.6, 13.9, 14, 23.5, 10.1, 11.9, 12.3, 26.6, 18.2, 12.8, 16.6, 11.6, 15.7
Chapter 1 Bitsy Griffin