could not be regarded as the experimental unit. The class, or the teacher (who applies the method, if he/she has multiple classes), would be the appropriate experimental unit.

Implementation

In most statistical studies, the goal is to generalize from the observed units to a larger set consisting of all comparable units that exist but are not directly observed. For example, if we randomly sample 100 people and ask them which candidate they intend to vote for in an election, our main interest is in the voting behavior of all eligible

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