CK-12 Foundation
Ck 12: Measures of Central Tendency and Dispersion Grades 9 10
[Free Registration/Login may be required to access all resource tools.] Decide which measure of central tendency best describes a data set.
Shodor Education Foundation
Shodor Interactivate: Stem and Leaf Plot
Shodor offers this interactive Stem and Leaf Plotter. The mean, median, and mode may be calculated or checked for accurracy with your given data. Be sure to check the "What?" link to find exercises and a lesson plan.
CK-12 Foundation
Ck 12: Measures of Central Tendency and Dispersion Grades 8 9
[Free Registration/Login may be required to access all resource tools.] Learn how to calculate different measures of central tendency, as well as the spread or dispersion of the data.
CK-12 Foundation
Ck 12: Measures of Central Tendency and Dispersion Grades 9 10
[Free Registration/Login may be required to access all resource tools.] Decide which measure of central tendency best describes a data set.