Fitting a simple regression model
After inspecting the scatter plot the next step is to fit a model to describe the relationship.
-
On the Analyse-it ribbon tab, in the
Fit group, click Fit > Polynomial 2 - Quadratic.
A 2nd order polynomial fit task is added to the analysis task pane.
-
On the Analyse-it ribbon tab, in the
Model group, click Test Effect of
Model.
The Effect of Model task is added to the analysis task pane.
-
Click Recalculate.
The results are calculated and the analysis report opens.
The regression line on the scatter plot shows the relationship described by the model.

The effect of model table p-value of 0.0011 tells you that there is a statistically significant relationship between spend and yield.

Next topic: Checking the assumptions of the regression model