Question

Exercice 7. The legal limit of a certain pollutant contained in the waste of a factory is 6mg/kg. An assay is performed on 12 samples, for which we observed an average of 7mg/kg with a standard deviation of 2.4. We admit normal distribuion of the dosage. 1. What test would suggest the plant manager? What would be its conclusion? 2. Knowing that if the mean concentration over 8 mg/kg is dangerous, what test would be suggested by the environmental MP of the region? Which would be his conclusion?

Answer 1