Htest                   Test for homoskedasticity at level one
cdata.ex                Clustered dataset for centering example
group_center            Group-mean center a variable
group_mean              Computes the group mean of a variable
hdp                     Hospital, doctor, patient (hdp) dataset
nmiss                   Amount of missing data per variable
ri_test1                Sample dataset 1 for testing the likelihood
                        ratio test
ri_test2                Sample dataset 2 for testing the likelihood
                        ratio test (LRT)
robust_mixed            Robust standard errors for mixed models
sch29                   Data from 29 schools (based on the NELS
                        dataset) used for regression diagnostics
suspend                 Suspension data from Virginia
thai                    Thai data from PISA
thai.sm                 Thai data from PISA (reduced)
wide                    Wide dataset to be used for growth modeling
