The next two numbers I need are the medians of the two halves. Since I used the "4.4" in the middle of the list, I can't re-use it, so my two remaining data sets are:

Since in list values have one decimal place and range from 3.9 to 5.1, I won't use a scale of, say, zero to ten, marked off by ones. Instead, I'll draw a number line from 3.5 to 5.5, and mark off by tenths.

Now I'll mark off the minimum and maximum values, and Q_{1},Q_{2}, andQ_{3}:

and the "box" part of the plot goes fromQ_{1}toQ_{3}:

And then the "whiskers" are drawn to the endpoints:

Please let me know if you need any clarification. I'm always happy to answer your questions.