If you see a lamp that doesn’t look like a lamp to you, but it expands your idea of what a lamp is, you are experiencing: A) image formation
B) mental concepts
C) concept expansion
D) concept formation

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.