Quasi-experiment, Advanced Statistics

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Quasi-experiment is a term taken in use for studies which resemble experiments but are weak on some of the characteristics, particularly that allocation of the subjects to groups is not under the investigator's control. By taking an example, if interest centred on the health effects of the natural disaster, the ones who experience the tragedy can be compared with the one who do not, but subjects cannot be deliberately assigned to the two groups. 


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