Science Test Grades The stem-and-leaf plots display the grades on a recent science test for two different
class periods. Which is the difference between the medians for Period 1 and Period 2?
Period #1
Porlod #2
Stem Leat
Stem Leaf
518
60. 1.4.9
6 1,2,5,7
72,2,4,6,8,9
71 7, 8,8
80.2.5.5.9
8 3,4,7, 8, 9
90,0,0,4.5, 8
9 2,3,3,3, 4, 7, 7, 8
Key = 9| 2 means 92% Key = 92 means 92%