1 INTRODUCTION  
1.1 Notation and Conventions

2 REGRESSION  
2.1 Scheme  
2.2 Distributions  
2.3 Priors

3 SAMPLE  
3.1 Luminosity and Temperature  
3.2 Gas Mass  
3.3 Hydrostatic Mass  
3.4 Covariance Uncertainty Matrix

4 SELECTION FUNCTION

5 RESULTS  
5.1 Hydrostatic Bias  
5.2 Gas vs Total Mass  
5.3 Luminosity vs Mass  
5.4 Temperature vs Mass  
5.5 Multi-scaling Analysis  
5.6 Intrinsic Scatters and Correlations

6 CONCLUSIONS