| .skewness | Helper function to calculate skewness for a vector | 
| calculate_pip_threshold | Calculate PIP Threshold | 
| calculate_stats_gamma | Calculate summary statistics and gamma parameters for each group | 
| calculate_stats_gaussian | Calculate summary statistics for each group | 
| estimate_mv_moments | Helper function to estimate moment vectors/matrices for observations within a group | 
| estimate_mv_shape_rate | Helper function to estimate shape, rate, and correlation parameters for observations within a group | 
| generate_mvGamma_data | Generate Multivariate Skewed Gamma Transformed Data | 
| metalExposChildren_df | Children's Environmental Heavy Metal Exposure Data | 
| simulate_group_data | Simulate Group Data | 
| simulate_group_gamma | Simulate Group Multivariate Data | 
| simulate_group_gaussian | Simulate Group Multivariate Gaussian Data | 
| transformers | Data Transformation Functions | 
| trans_log | Data Transformation Functions | 
| trans_ratio | Data Transformation Functions | 
| trans_root | Data Transformation Functions |