![]() ![]() The stem and leaf diagram is not practical for large data sets, so we need a different, purely graphical way to represent data. There are two perfect scores three students made scores under 60 most students scored in the 70s, 80s and 90s and the overall average is probably in the high 70s or low 80s. Either way, with the data reorganized certain information of interest becomes apparent immediately. The display is made even more useful for some purposes by rearranging the leaves in numerical order, as shown in Figure 2.2 "Ordered Stem and Leaf Diagram". Thus the three leaves 9, 8, and 9 in the row headed with the stem 6 correspond to the three exam scores in the 60s, 69 (in the first row of data), 68 (in the third row), and 69 (also in the third row). The number in the units place in each measurement is a “leaf,” and is placed in a row to the right of the corresponding stem, the number in the tens place of that measurement. The numbers in the tens place, from 2 through 9, and additionally the number 10, are the “stems,” and are arranged in numerical order from top to bottom to the left of a vertical line. One way to do so is to construct a stem and leaf diagram as shown in Figure 2.1 "Stem and Leaf Diagram". ![]() ![]() However the data set may be reorganized and rewritten to make relevant information more visible. How did the class do on the test? A quick glance at the set of 30 numbers does not immediately give a clear answer. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |