the study and use of theory and methods for the analysis of data arising from random processes or phenomena

• Statistics

• Biostatistics

• Epidemiology

the branch of applied statistics directed toward applications in the health sciences and biology

• Statistics

• Biostatistics

• Epidemiology

Design experiments and observational studies

• Making hypotheses

• gathering data

• Drawing interferences

Summary of data

• Making hypotheses

• gathering data

• Drawing interferences

Testing of hypotheses

• Making hypotheses

• gathering data

• Drawing interferences

Observational studies

• Non-experimental

• Experimental

• Randomized

• Population based

Non-experimental

• Population based

• Individual based

• Randomized

• Non-randomized

Experimental

• Population based

• Individual based

• Randomized

• Non-randomized

interventional studies

• Non-experimental

• Experimental

• Randomized

• Population based

Experimental - randomized

• Clinical trial

• Control trial

• Communitry trial

• Field trial