Select Validation Data
To specify validation data for the currently selected fit in the Curve Fitter app, follow these steps:
On the Curve Fitter tab, in the Data section, click Validation Data. The app opens the Select Validation Data dialog box.
In the dialog box, select variables for X data and Y data (and Z data for surfaces).
When you select two or three variables, depending on whether your data is for a curve or a surface, the app calculates validation statistics (SSE and RMSE) and displays them in the Results and Table Of Fits panes. For definitions of these statistics, see Using the Statistics in the Table of Fits. The app displays the validation data points on the fit plot and the residuals plot along with the original data.
Close the dialog box.