Module 07 Summary

What this module established

Always plot the scatter before reporting a correlation. Curves and clusters both produce respectable coefficients, and neither is a linear relationship.

Carry forward

• Draw a fitted line only with the points, and report r-squared beside it. Half the spread can survive a respectable fit.
• Colour by any grouping variable you have. A relationship that disappears within groups was a relationship between the groups.
• Report the coefficient and the sample size; do not upgrade a correlation into a cause or a controlled effect.

Before moving on

Move on when you have checked for confounders and written a finding sentence that claims no more than the data supports.

Mark complete