During ventricular systole, the Group of answer choices atria are contracting. blood is entering the ventricles. pressure in the ventricles remains constant. pressure in the aorta remains constant. AV valves are closed.

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.