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Measures of variation Box and whisker plot.notebook
1
February 06, 2015
May 205:22 PM
BoxandWhisker Plots
A boxandwhisker plot uses a number line to show the distribution of a set of data. The box is drawn around the quartile values, and the whiskers extend from each quartile to the extreme data points that are not outliers.
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13
2 4 6 8 10 12 14
• First, be sure your data is arranged from least to greatest.
• Now you are ready to construct the actual box & whisker graph. You will need to draw an ordinary number line that extends far enough in both directions to include all the numbers in your data.
Example:
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Mar 1910:50 AM
• A boxandwhisker uses a number line to show the distribution of a set of data. • The box is drawn around the quartile values• The whiskers extend from each quartile to the extreme data points that are not outliers.
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 158:44 PM
Find the median of the entire set.
2, 3, 5, 6, 8, 9, 12, 12, 13
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
Medianof entire set
2, 3, 5, 6, 8, 9, 12, 12, 13
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
Medianof entire set
2, 3, 5, 6, 8, 9, 12, 12, 13
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 158:53 PM
Find the median of the lower half - lower quartile.
2, 3, 5, 6, 8, 9, 12, 12, 13
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire set
Median of lower halfLower Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire set
Median of lower half
4Lower Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 158:53 PM
Find the median of the upper half - upper quartile.
2, 3, 5, 6, 8, 9, 12, 12, 13
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire set
Median of lower halfMedian of upper half
12
Upper Quartile
4Lower Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire set
Median of lower half Median of upper half
12
Upper Quartile
4Lower Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
13
February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire set
Median of lower half Median of upper half
12
Upper Quartile
4Lower Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 158:54 PM
The whiskers are the smallest and largest numbers - except when there are outliers.
2, 3, 5, 6, 8, 9, 12, 12, 13
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire setLeast Value
Median of lower half Median of upper half
4 12
Lower Quartile Upper Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
16
February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire setLeast Value
Median of lower half Median of upper half
4 12
Lower Quartile Upper Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
17
February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire setLeast Value
Median of lower half Median of upper half
4 12
Lower Quartile Upper Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire setGreatestValue
Least Value
Median of lower half Median of upper half
4 12
Lower Quartile Upper Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire setGreatestValue
Least Value
Median of lower half Median of upper half
4 12
Lower Quartile Upper Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
20
February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire setGreatestValue
Least Value
Median of lower half Median of upper half
4 12
Lower Quartile Upper Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Mar 1910:47 AM
NOTE: Boxandwhisker plots separate data into four parts. Even though the parts may differ in length, each part contains 1/4 (25%) of the data.
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February 06, 2015
Mar 1910:56 AM
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February 06, 2015
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Label ActivityLabel ActivityLower Quartile
Greatest Value
Upper Quartile
Least Value Median
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0 10 20 30 40 50 60 8070 90 100
1. What is the median of the data represented in the graph? a) 35 b) 75 c) 65 d) 55
2. What is the Upper Quartile? a) 65 b) 70 c) 85 d) 75
3. What is the minimum value according to this graph? a) 13 b) 35 c) 17 d) 100
Quick
Check
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 67:39 AM
Draw and label a Box and Whisker Plot for each.
range: 10
median: 16
upper quartile: 19
lower quartile: 12
interquartile range: 7
outliers: no outliers
10, 12, 15, 16, 17, 19, 20 Least to greatest:
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 67:42 AM
Draw and label a Box and Whisker Plot for each.
range: 30
median: 26.5
upper quartile: 28
lower quartile: 23
interquartile range: 7
outliers: 11 and 41
11, 22, 23, 25, 26, 27, 28, 28, 29, 41Least to greatest:
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 67:43 AM
Draw and label a Box and Whisker Plot for each.
range: 58
median: 47
upper quartile: 52
lower quartile: 39.5
interquartile range: 12.5
outliers: 14 and 72
Least to greatest: 14, 36, 43, 47, 47, 48, 56, 72
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 67:43 AM
Draw and label a Box and Whisker Plot for each.
range: 26
median: 62
upper quartile: 72.5
lower quartile: 55.5
interquartile range: 17
outliers: no outliers
51, 54, 57, 59, 62, 64, 72, 73, 77Least to greatest:
Measures of variation Box and whisker plot.notebook
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February 06, 2015
May 205:34 PM
Draw and label a Box and Whisker Plot for each.
Try these on your own!Try these on your own!
106, 107, 107, 108, 109, 114, 115, 117, 117, 124median: 111.5lower quartile: 107upper quartile: 117least value: 106greatest value: 124outliers: none
#14 on page 522
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February 06, 2015
Mar 311:03 AM
Draw and label a Box and Whisker Plot for each. #13 on page 522
median: 90.5lower quartile: 86upper quartile: 92least value: 85greatest value: 95outliers: 72
72, 85, 86, 88, 90, 91, 92, 92, 93, 95
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February 06, 2015
Explore
What day were you born on?
____, ____, ____, ____, ____, ____, ____, ____, ____,
____, ____, ____, ____, ____, ____, ____, ____, ____
1. Create a box and whisker plot from that data above: Create a number line and draw the box below the number line.
2. Label the upper quartile, lower quartile, median, upper extreme, lower extreme
3. Write: Step by step how you found the quartiles and median
Enrichment ActivityEnrichment Activity
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February 06, 2015
May 112:58 PM
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 68:34 AM
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 68:33 AM
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 68:34 AM
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Apr 307:58 PM
2, 3, 5, 6, 8, 9, 12, 12, 13Median
of entire setLeast Value
GreatestValue
Median of lower half Median of upper half
4 12
Lower Quartile Upper Quartile
2 4 6 8 10 12 14
Measures of variation Box and whisker plot.notebook
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February 06, 2015
Feb 68:32 AM