25% of the data is on the whisker from the minimum to the lower quartile.A box and whisker plot breaks the data into 4 equal parts.Try this: Create a box-and-whisker plot of the following data (click for you answer when finished). Here is our data 15, 15, 17, 18, 21, 24, 29, 30, 36, 37 Step 3 – Plot the points a little above our number line ġ4 18 22 26 30 34 38 Let’s make a Box and Whisker Plot. Here is our data 15, 15, 17, 18, 21, 24, 29, 30, 36, 37 Step 2 – Find the Values needed From our earlier calculations: ġ4 18 22 26 30 34 38 Let’s make a Box and Whisker Plot. Here is our data 15, 15, 17, 18, 21, 24, 29, 30, 36, 37 Step 1 – a number line Our data goes from 15 to 37, our number line can go from 14 to 38, with an interval of 2 Interquartile Range: UQ-LQ The whiskers go from the minimum to the lower quartile and the upper quartile to the maximumġ4 18 22 26 30 34 38 Let’s make a Box and Whisker Plot.The box goes around these! What do you need for a Box and Whisker Plot? Therefore it is the Upper Quartile Upper Quartile Here is the middle (median) 30 is the median of the bottom half of the data. Therefore it is the Lower quartile Lower Quartile Here is the middle (median) 17 is the median of the bottom half of the data. Since there is no number in the middle, we find the mean of the 2 middle numbers.Put the numbers in order from least to greatest.Median Review Recall from lesson 1.3, that a median is the number in the middle of a set of data, when it is put in order. Box and Whisker Plots Module I, Lesson 5 Online Algebra Median Maximum Lower Quartile Upper Quartile Box and Whisker Plots A Box and Whisker Plot is a diagram that divides a set of data into 4 parts using the median and the quartiles.