To draw a box and whisker plot, we can proceed as follows:
1. We will need the following values:
• The ,minimum, value of the data
,
• The ,first quartile (Q1)
,
• The ,median, (or the second quartile, Q2)
,
• The ,third quartile, (Q3)
,
• And the ,maximum value, of the data
If we assume that the correct values for these statistics are:
• Minimum: 17
,
• Q1: 23.75
,
• Median: 32
,
• Q3: 41
,
• Maximum: 45
We can plot this information as follows:
1. Plot a number line with an appropriate scale.
2. Identify in the number line the minimum, Q1, Q2, Q3, and the maximum.
3. The box starts in Q1 and ends in Q3.
4. The minimum and maximum are represented outside the box.