Name:________________________
TOPIC: Box and Whisker plots
Objective
Create a box and whisker plot that represents a given data set.
A box-and-whisker plot is a graph (a drawing) that summarizes a data set.

A box-and-whisker plot has four parts.

Each part is called a ________________________.

Each part represents ______________ of the data.
0
2
4
6
8
10
12
14
What is the median of the data set? ______
What is the range of the data? _______________
What is the interquartile range of the data? ___________
What is the lowest value in the data set? ________
The highest value of the data set? ________
Does this data set include a data point with a value of 16? ________
What percent of the data is:
Between the values 2 and 5? _________
…between the 7 and 14? ___________
…between the values of 2 and 12? ___________
What percent of the data is between the interquartile range? ___________
16
Creating a box-and-whisker plot from a given data set:

Write the data numbers in increasing order.
The first and last number will be the (1) minimum and (2) maximum values.

Find the (3) median, circle it with a solid circle.

Next, find the “median” of each half of the data set, (to the left and right of the median).
These are the (4) upper and (5) lower quartile values.

Draw the box-and-whisker plot using these 5 numbers.
6, 8, 4, 12, 5, 8, 2, 10, 7, 3, 9
Creating a box-and-whisker plot using the calculator

Press

Press

A list of results will show. Press

Find MIN, Q1, MEDIAN, Q3, and MAX on the list.

These are the 5 numbers you
need to create the box-andwhisker plot.
, then enter your list of data points.
to scroll down.
Use the calculator to create a
box  and  whisker plot for :
3, 8, 6, 7, 8, 1, 4, 3, 9, 5, 2
Interpreting a box-and-whisker plot
Case 1: Number of points is a multiple of 4
If the box and whisker plot to the right represents a data set with 32 data points,
how many data points….
are between 14 and 23? ______________
are between 11 and 19? ______________
are greater than 21?______________
are between the interquartile range? _________
9
11
13
15
19
17
21
23
25
Case 2: Number of points is NOT a multiple of 4
If the box and whisker plot to the right represents a data set with 9 data points,
how many data points….
are between 30 and 34? ______________
are larger than the median? _______________
are 33 or less? _______________
24
26
28
30
32
34
36
38
40