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189_G5U32_G6U24_WB˜ ˙—» ¿º 2011.7.4 2:21 PM ˘ ` 22
189-P4-2
3. The following stem-and-leaf plots shows the age of swimmers in a pool. What is
the mean, mode, and median of the data set?
Age of Swimmers
Stem Leaves
1 2579
2 011 12
32
4. The following shows the number of people that visited the school library. What is
the difference between the number of low and high level students in 2007?
Number of People
Visited the School Library
Number of Visitors 20,00 high level
16,00 low level
12,00
800
400
0 2006 2007 2008 2009 2010
Year
189-P4-2
3. The following stem-and-leaf plots shows the age of swimmers in a pool. What is
the mean, mode, and median of the data set?
Age of Swimmers
Stem Leaves
1 2579
2 011 12
32
4. The following shows the number of people that visited the school library. What is
the difference between the number of low and high level students in 2007?
Number of People
Visited the School Library
Number of Visitors 20,00 high level
16,00 low level
12,00
800
400
0 2006 2007 2008 2009 2010
Year
