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Build a Box and Whiskers Plot Box and Whisker plots are related to median averages

4[.5a Box Whiskers

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Page 1: 4[.5a Box Whiskers

Build a Box and Whiskers

Plot

Box and Whisker plots are

related to median averages

Page 2: 4[.5a Box Whiskers

First: Line up your numbers

2

5

3

6

12

9

1

4

2

4

Page 3: 4[.5a Box Whiskers

Find the median

• Find the median of the top group. (Quadrant 1)

• Find the median of the bottom group. (Quadrant 3)

• Take note of the minimum and maximum values.

2

5

3

6

9

1

4

2

4

12

Page 4: 4[.5a Box Whiskers

Build the plot

• The number spacing should be similar to the spacing in a number line

1

2

4

6

12

863 7 12111 42 5 109

Page 5: 4[.5a Box Whiskers

Each number gets a bar above it.

• The box covers the middle three lines

6 121 42

Page 6: 4[.5a Box Whiskers

Complete the Plot

• The whiskers extend out from the box.

• The plot below shows an unbalanced shift to the left.

6 121 42

Page 7: 4[.5a Box Whiskers

Try One

12 13 14 15 16 17 18 19 20The above number line can be used as a pattern for the box

and whiskers plot.

14.812.2

20.3

18.7

16.4

15.7

17.2

15.9

18.9

16.6

16.3

15.1

19.1

13.3

16.4

12.5

Page 8: 4[.5a Box Whiskers

Find the min, max, median, and Q1 & Q3 values

12 13 14 15 16 17 18 19 20The above number line can be used as a guide for the box

and whiskers plot.

14.8

12.2

20.3

18.7

16.4

15.7

17.2

15.9

18.9

16.6

16.3

15.1

19.1

13.3

16.4

12.5

(16.3+16.4)/2= 16.35

(14.8+15.1)/2= 14.95

(17.2+18.7)/2= 17.95

Page 9: 4[.5a Box Whiskers

Put the min, max, median, and Q1 & Q3 values on their places on a

number line.

12 13 14 15 16 17 18 19 20The above number line can be used as a guide for the box

and whiskers plot.

17.95

16.35

14.95

12.5

20.3

Page 10: 4[.5a Box Whiskers