Like all sciences, forensics using the scientific method to reach conclusions. however, in forensics, this method is followed a little differently. why does the traditional format of the scientific method not work within the forensics field?

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.