Stem and Leaf Plots are another graphical tool used to visualize frequency statistics. These examine groups of numbers and sort them out based on their first digits, then further sorts them using the rest of them. They allow you to visualize how many times a particular number occurred for the units. This stem and leaf plot measures heights of 218 volcanoes in 100's of feet, so it is truly useful for geovisualization. The top line suggests that there was one volcano each for the heights of 900 ft, 800 ft, 700 ft, 500 ft, and 200 ft, while three volcanoes stood 600 ft tall. Just from looking at this plot, one could make an educated guess about the mean and median height of volcanoes being somewhere between 5000-7000 ft.
No comments:
Post a Comment