Why are scientists concerned about invasive species?

How dose plate tectonics effect climate

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.

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?