Question

The Environmental Protection Authority claims that its regulatory procedures for use of a new pesticide are safe. The basis of the claim is that regulation is built around the 1 mg/L no observable effect concentration recorded in toxicological testing. (a) What is meant by no observable effect concentration in the context of toxicology testing? (five marks) Concerned stakeholders carry out their own toxicology tests and summarise results using 95% confidence intervals as shown below. (b) Do these results support the Authority's claim that regulatory procedures for use of a new pesticide are safe? In your answer, explain the term 'statistical power' and its relevance here. (ten marks) zero (control) 1 mg/L 2 mg/L 3 mg/L concentration effect

Answer 1

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