What is the interquartile range of the data set? enter the answer in the box. key: 1|5 means 15 a stem-and-leaf plot with a stem value of 1 with a leaf value of 0, a stem value of 2 with a leaf value of 3, 3, 8, a stem value of 3 with a leaf value of 3, a stem value of 4 with a leaf value of 5, a stem value of 5, a stem value of 6, a stem value of 7, a stem value of 8 with a leaf value of 0, and a stem value of 9 with a leaf value of 0.