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Select the correct definition of an observational study from the choices below.A study where subjects...

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Select the correct definition of an observational study from the choices below.A study where subjects are selected based on convenience to the researcher.A study that rejects or fails to reject a statistical hypothesis about a population parameter.A study where neither the subjects nor the researchers know what treatments are being administered towhich subjects.A study where researchers manipulate variables and impose treatments on the subjects in the study, then measure andrecord the responses of the subjects.A study where researchers measure and record data about the subjects in the study, but do not apply any treatments tothe subjects or manipulate any variables.

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