While mrna stands are being created a sequence is sometimes miscopied. what is the best possible outcome, the worst possible outcome and the long-term effect on the cell if mrna strands were miscopied?

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.