A scientist wants to test how much of an acid can be added to a solution before the pH of the solution changes to below a certain point. The starting
pH of the solution is 6.0, and the scientist wants to know when the pH of the
solution changes to below 4.0,
Which pH indicator should the scientist use?

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.