Compare the processes of aerobic and anaerobic respiration. What are the reactants and products of each process? How much ATP does each process yield? no links or keyboard spam and please give an answer that I can understand

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.