How to make a box and whisker plot

How to make a box and whisker plot

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What Is A Box and Whisker Plot?

These are graphical depictions of variation in a data set. Normally, a histogram analysis would suffice, however, a box and plot will provide better detail whilst additionally letting several data sets be shown via the same graph.

box and whisker plot

  • Median (Q2 / 50th percentile): Middle value of the data set
  • First Quartile (Q1): 25th percentile of the data set
  • Third Quartile (Q3): 75th percentile of the data set

5 Number Summary

The way to create a box and plot comes from the 5 following statistics:

  • Minimum value: The smallest data set value.
  • 2nd quartile: Value under which the lower 25 percent of the data are confined.
  • Median value: Middle number in a group of numbers.
  • 3rd quartile: Value over which the top 25 percent of the data are confined.
  • Maximum value: Biggest data set value.

Now that you understand the 5-number summary as well as the vital points, we can look at some steps for creating a box and whiskers plot.

How do you Make a Box and Whisker Plot?

  • Step one: Arrange the data from least to most.
  • Step two: Determine the median.
  • Step three: Determine the quartiles.
  • Step four: Complete the 5-number summary via calculating the minimum as well as the maximum values.

Creating a Box Plot  

  • Step one:  Scale as well as label an axis which matches the 5-number summary.
  • Step two: Draw whiskers going from Q1 to the min-age value as well as going Q3 to the max-age value.


The graph you end up with provides the minimum, median, lower and upper quartile, as well as the max-age value of the pupils contained in the dataset.

Free printable Worksheets

Exercises for Box and Whisker Plots

1) Write the five-number summary for the set of data: 41, 27, 30, 64, 47, 52, 47, 27, 63

2) Write the five-number summary for the set of data: 37, 72, 33, 61, 39, 52, 80, 60

3) Write the five-number summary for the set of data: 15, 32, 17, 28, 12, 28, 35, 17, 24

4) Write the five-number summary for the set of data: 57, 69, 54, 81, 65, 52, 57, 61

5) Write the five-number summary for the set of data: 72, 68, 75, 70, 65, 61, 82, 81

6) Write the five-number summary for the set of data: 29, 35, 18, 53, 12, 32, 17, 25, 41

7) Write the five-number summary for the set of data: 73, 83, 67, 63, 59, 75, 55, 69, 59

8) Write the five-number summary for the set of data: 75, 85, 98, 93, 61, 78, 65, 76, 68

9) Write the five-number summary for the set of data: 99, 89, 108, 76, 105, 73, 93, 82

10) Write the five-number summary for the set of data: 82, 66, 89, 95, 69, 98, 61, 78, 73, 80

 

1) Write the five-number summary for the set of data: 41, 27, 30, 64, 47, 52, 47, 27, 63

First, we should arrange the given data from smallest to highest: 27, 27, 30, 41, 47, 47, 52, 63, 64
Now, according to the above data:

  • Minimum = 27
  • Q1 = 27 + 302 = 28.5
  • Q2 = 47
  • Q3 = 52 + 632 = 57.5
  • Maximum = 64

2) Write the five-number summary for the set of data: 37, 72, 33, 61, 39, 52, 80, 60

First, we should arrange the given data from smallest to highest: 33, 37, 39, 52, 60, 61, 72, 80
Now, according to the above data:

  • Minimum = 33
  • Q1 = 37
  • Q2 = 52 + 602 = 56
  • Q3 = 72
  • Maximum = 80

3) Write the five-number summary for the set of data: 15, 32, 17, 28, 12, 28, 35, 17, 24

First, we should arrange the given data from smallest to highest: 12, 15, 17, 17, 24, 28, 28, 32, 35
Now, according to the above data:

  • Minimum = 12
  • Q1 = 15 + 172 = 16
  • Q2 = 24
  • Q3 = 28 + 322 = 30
  • Maximum = 35

4) Write the five-number summary for the set of data: 57, 69, 54, 81, 65, 52, 57, 61

First, we should arrange the given data from smallest to highest: 52, 54, 57, 57, 61, 65, 69, 81
Now, according to the above data:

  • Minimum = 52
  • Q1 = 54
  • Q2 = 57 + 612 = 59
  • Q3 = 69
  • Maximum = 81

5) Write the five-number summary for the set of data: 72, 68, 75, 70, 65, 61, 82, 81

First, we should arrange the given data from smallest to highest: 61, 65, 68, 70, 72, 75, 81, 82
Now, according to the above data:

  • Minimum = 61
  • Q1 = 65
  • Q2 = 70 + 722 = 71
  • Q3 = 81
  • Maximum = 82

6) Write the five-number summary for the set of data: 29, 35, 18, 53, 12, 32, 17, 25, 41

First, we should arrange the given data from smallest to highest: 12, 17, 18, 25, 29, 32, 35, 41, 53
Now, according to the above data:

  • Minimum = 12
  • Q1 = 17 + 182 = 17.5
  • Q2 = 29
  • Q3 = 35 + 412 = 38
  • Maximum = 53

7) Write the five-number summary for the set of data: 73, 83, 67, 63, 59, 75, 55, 69, 59

First, we should arrange the given data from smallest to highest: 55, 59, 59, 63, 67, 69, 73, 75, 83
Now, according to the above data:

  • Minimum = 55
  • Q1 = 59 + 592 = 59
  • Q2 = 67
  • Q3 = 73 + 752 = 74
  • Maximum = 83

8) Write the five-number summary for the set of data: 75, 85, 98, 93, 61, 78, 65, 76, 68

First, we should arrange the given data from smallest to highest: 61, 65, 68, 75, 76, 78, 85, 93, 98
Now, according to the above data:

  • Minimum = 61
  • Q1 = 65 + 682 = 66.5
  • Q2 = 76
  • Q3 = 85 + 932 = 89
  • Maximum = 98

9) Write the five-number summary for the set of data: 99, 89, 108, 76, 105, 73, 93, 82

First, we should arrange the given data from smallest to highest: 73, 76, 82, 89, 93, 99, 105, 108
Now, according to the above data:

  • Minimum = 73
  • Q1 = 76
  • Q2 = 89 + 932 = 91
  • Q3 = 105
  • Maximum = 108

10) Write the five-number summary for the set of data: 82, 66, 89, 95, 69, 98, 61, 78, 73, 80

First, we should arrange the given data from smallest to highest: 61, 66, 69, 73, 78, 80, 82, 89, 95, 98
Now, according to the above data:

  • Minimum = 61
  • Q1 = 69
  • Q2 = 78 + 802 = 79
  • Q3 = 89
  • Maximum = 98

Box and Whisker Plots Quiz