Viruses come in what kind of shapes and sizes?
A. only square or rectangular
B. only cube or prism
C. many different
D. always spherical

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.