However, since our #"Q3"# and maximum value were the same, there is no right whisker. In the end, a box-and-whisker plot looks something like this: This "box" is called the interquartile range because it consists of the #"Q1", "Q2",# and #"Q3"# values, along with everything in between.įinally, draw lines extending out from the box and connect them to the minimum values. Now that we have the five values we need, make a number line and draw lines where each value occurs.Ĭonnect the middle three lines to form a box. To start the conversation again, simply ask a new question. ![]() The two middle numbers are #100# and #100# the average of these is #100#. Support Communities / iWork / Numbers for Mac Looks like no one’s replied in a while. The two middle numbers are #90# and #90# the average of these is #90#.įind the median of the upper half of the data, which is #100, 100, 100, 100#. The #"Q1"# and #"Q3"# values are simply the medians of the two halves of our data.įind the median of the lower half of the data, which is #60, 90, 90, 92#. To find the middle number, find the average of them. In this case, there are two middle numbers: #92# and #100#. ![]() You must first arrange the numbers in order from least to greatest, but here they are already in this order. The median can be calculated by finding the middle number out of the set.To create a box-and-whisker plot, you need five values: the minimum, the #"Q1"#, #"Q2"# (also known as the median), #"Q3"# values, and the maximum.
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