How can you best help prevent water pollution?

a. By being careful with household chemicals you dump down the sink or into storm drains.

b. By refusing to use products made in large factories.

c. By never taking a bath or shower for more than 10 minutes.

d. By drinking as little water as possible.

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.