Mathematics, 21.07.2019 01:30 arpita111
The difference between an observational study and an experiment is thatin an observational study only one group is studied, and in an experiment two groups are studied in an observational study, researchers do not control treatment, and in an experiment they doin an experiment cause and effect is analyzed, and in an observational study, it is not in an experiment one group is studied over a short period of time, and in an observational study, the group is studied over a longer period of time
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