A poll conducted by the Gallup organization asked American adults whether or not they are generally satisfied with their physical attractiveness. One goal of the study was to investigate whether men and women diff er with regard to responses on this issue.
a. Identify the explanatory and response variables in this study.
b. Is this an observational study or an experiment? Explain briefly.
c. If this study were conducted well, would it have involved random sampling, random assignment, or both? Explain.