The scores eamed in a flower-growing competition are represented in the stem-and-leaf plot. 05 10, 3, 7 2 4, 6, 8 3 2 4 5 8 Key: 518 means 58 What is the appropriate measure of variability for the data shown, and what is its value? O The range is the best measure of variability, and it equals 18.5. O The IQR is the best measure of variability, and it equals 45. The range is the best measure of variability, and it equals 45. O The IQR is the best measure of variability, and it equals 18 5