Problem

A simple random student sample is drawn from the complete school roster to study all enrolled students. Assess frame coverage, selection chances, the bias mechanism reduced, the supported population inference, and remaining limitations.

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The complete roster covers enrolled students; random selection gives equal known chances, reduces class/friend-group overrepresentation, and supports inference to roster students subject to nonresponse and sampling uncertainty.

The roster covers enrolled students and chances are equal, but generalize to students outside the school roster.

Call the complete school roster undercovered; still claim equal chances and inference to all enrolled students without a coverage limitation.

The roster covers the target and chances are equal, but claim random selection removes all nonresponse and sampling uncertainty.

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A simple random student sample is drawn from the complete school roster to study all enrolled students. Assess frame coverage, selection chances, the bias mechanism reduced, the supported population inference, and remaining limitations.

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