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| 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 |
| Htest | Test for homoskedasticity at level one |
| 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 |