CAIE A-Level Biology A2 P5.7 Evaluation of Investigations Questions

Use control comparisons and quoted data to judge effectiveness, then identify unrealistic conditions or missing sampling and outcome information before accepting the conclusion.

Exam points

Evaluate treatment effectiveness by comparing treatment and control data, then qualify validity using realistic conditions, remaining effects and limits on biological relevance.
Identify missing sampling, reporting, outcome and geographical information that is needed before confidence can be placed in a survey conclusion.

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