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08 March 2013
Build a correlation coefficient tutorial
Ronald Zeller built this interactive app in LiveCode so that his students could explore correlation coefficients. It illustrates sample positive, negative and neutral correlations. When the students select various functions it displays the statistics contributing to the correlation values and a plot of the various data sets with a best-fit line. Students can drag data points to new locations on the chart and then recalculate the values to observe the effect. They can also create a new data set of their own and then calculate and plot that data to further explore the principles. When they are ready they can take an exit quiz which submits performance data via a server-based SQL database.
Note: The plot points appear larger than normal to allow selecting and dragging on an iPad.