Box-and-Whisker Plots in Data Analysis
12.4
Box-and-Whisker
Plots
Definitions:
•
Minimum: Smallest number in the set of data
(ordered least to greatest)
•
Maximum: Largest number in the set of data
(ordered least to greatest)
•
Median: Middle number in the set of data
(ordered least to greatest)
•
1
st
Quartile: The middle number of the lower
half of the data (ordered least to greatest)
•
3
rd
Quartile: The middle number of the upper
half of the data (ordered least to greatest)
When making a Box-and-Whisker
Plot:
•
Put numbers in order from least to
greatest
•
Find the minimum, maximum, and
median
•
Find the 1
st
quartile and the 3
rd
quartile
•
Represent the data in box-and-
whisker format
Make a box-and-whisker plot to
represent the set of data:
125 80 140 135 126 140 350 75
Example 1
Example 1 Work
125 80 140 135 126 140 350 75
Make a box-and-whisker plot to represent
the set of data:
95 85 75 85 65 60 100 105 75 85 75
Example 2
Example 2 Work
95 85 75 85 65 60 100 105 75 85 75
Box-and-Whisker plots visually represent data distribution, including the minimum, maximum, median, and quartiles. By following specific steps, such as organizing data from least to greatest and identifying key values, anyone can create these plots to gain insights into the data spread.
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Presentation Transcript
12.4 Box-and-Whisker Plots
Definitions: Minimum: Smallest number in the set of data (ordered least to greatest) Maximum: Largest number in the set of data (ordered least to greatest) Median: Middle number in the set of data (ordered least to greatest) 1stQuartile: The middle number of the lower half of the data (ordered least to greatest) 3rdQuartile: The middle number of the upper half of the data (ordered least to greatest)
When making a Box-and-Whisker Plot: Put numbers in order from least to greatest Find the minimum, maximum, and median Find the 1stquartile and the 3rd quartile Represent the data in box-and- whisker format
Example 1 Make a box-and-whisker plot to represent the set of data: 125 80 140 135 126 140 350 75
Example 1 Work 125 80 140 135 126 140 350 75
Example 2 Make a box-and-whisker plot to represent the set of data: 95 85 75 85 65 60 100 105 75 85 75
Example 2 Work 95 85 75 85 65 60 100 105 75 85 75
