The model matrix. See Coding for Nominal Effects in the Fitting Linear Models book for information on the coding for nominal effects. Also, See Model Matrix in Custom Designs.
Note: You can view the model matrix by running Fit Model. Then select Save Columns > Save Coding Table from the red triangle menu for the main report.
βι
The variance of is given by the ith diagonal entry of , where σ2 is the error variance. Denote the ith diagonal entry of by .
The error variance, σ2, is estimated by the MSE, and has degrees of freedom, where n is the number of observations and p is the number of terms other than the intercept in the model.
Under the null hypothesis, the test statistic F0 has an F distribution on 1 and degrees of freedom.
If the true value of is , then F0 has a noncentral F distribution with noncentrality parameter given by:

Help created on 7/12/2018