a scientist makes the following statement it's Earth's early atmosphere had been rich in oxygen photosynthetic organisms would have not been able to evolve which of the following statements can be used to argue against this hypothesis

Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.