Why do amphibians live near water?
a. to prevent drying out and as a food source
b. to prevent drying out and to lay their eggs
c. to prevent dring out and to have water
d. to prevent drying out and to be close to flora for protection

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.