Education Technology

Tootsie Pops & Hand Span

Activity Overview

Students will collect data, find the linear regression model of the data, and address aspects of the data that affect regression.


Students will:

  • decide on data collection methodology and collect data.
  • plot data on a scatter plot.
  • find and interpret the correlation coefficient, coefficient of determination, and the equation of the least-squares regression line.
  • add the least-squares regression line to their scatter plot and make a residual plot.
  • identify outliers and influential points.
  • use their model to make predictions.
  • discuss sources of error in the data collection, and discuss causation.