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ORC Resource Number #1464
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The Regression Line and Correlation: The Effects of Outliers
PROFESSIONAL COMMENTARY

In the second of four related activities (all accessible from this site), students work with bivariate data to investigate relationships between variables. The applet allows students to enter bivariate data on a coordinate grid using various scales. The applet then graphs the regression line, shows its equation, and indicates the correlation between the variables. Students are then asked to enter outlier data to see the effect of extreme data on the regression line. (author/sw)

OHIO STANDARDS
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Mathematics Academic Content Standards
Data Analysis and Probability Standard
NATIONAL STANDARDS
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Principles and Standards for School Mathematics
Data Analysis and Probability Standard
RESOURCE TYPE
Content Resource
STANDARDS ALIGNMENT
Grades 8–12
TOPICS
Mathematics --
Statistics;
Data analysis;
Technology;
KEYWORDS
applet;
bivariate data;
line of best fit;
regression line;
correlation;
outlier
Publisher: National Council of Teachers of Mathematics