Was There an Impact?

A major challenge in impact assessment, program, and policy evaluation, is determining whether our actions had a meaningful impact. Did our program work? Is the policy effective? Frequently, data analytics use tests of statistical significance (such as F, t, p, R2) to answer this question. Unfortunately, tests of statistical significance can’t answer questions concerning impact. Using some example in environmental monitoring, including a major study conducted on the impact of oil sands development on public health, we show how using statistical significance tests misleads the public and decision makers. Download  <Was There an Impact?>

 

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