The Parameter Estimates are plotted using the vertical axis. These are the scaled parameter estimates. They are derived for a model expressed in terms of centered and scaled predictors (see Parameter Estimates for Centered and Scaled Predictors).

The horizontal scaling for the plot is given in terms of the Magnitude of Scaled Parameter Estimates. This is the l1 norm, defined as the sum of the absolute values of the scaled parameter estimates for the model for the mean. (Estimates corresponding to the intercept, dispersion parameters, and zero-inflation parameters are excluded from the calculation of the l1 norm.) A vertical red line is placed at the value of the l1 norm for the solution displayed in the Parameter Estimates for Centered and Scaled Predictors report.

The p-value for the Wald test.

The p-value for the Wald test.

The p-value for the Wald ChiSquare test.