How to Identify the Upper & Lower Extremes of Box & Whisker Plots


Hi, I'm Rachel, and today we're going to be going over how to determine the upper and lower extremes in a box and whiskers plot. A box and whiskers plot is a way to organize a range of data and on a number line. So we have a number line like so and we have the box and the median in the middle. So this median right, is going to be at the center, the dot, that's the median of the data. Now we usually have the numbers written on the number line with this being the lowest extreme, so we'll make that as 1 and this being the highest extreme so we'll make that a 5 and then this will be the middle number in between so that will be 3, halfway in between 1 and 5, the middle number. Now, this part of the lower extreme is going to be halfway in between 1 and 3 which it's not drawn quite symmetrically but that is going to be 2 and this part is going to be halfway in between 3 and 5 so that is going to be 4. So here is our lower extreme and here is our upper extreme and that's in the box and whiskers plot and it kind of looks like a box with whiskers, right, from the number line. And that's it. I'm Rachel and thank you very much for learning with me today.

Rachel Kaplove has worked as a professional private tutor since 2005. Specializing in Math and Science, she tutors students from the second grade level to advanced high school honors levels.