in the following table, indicate whether the researcher in the scenario is collecting experimental data or observational data. scenario experimental data observational data a pediatrician randomly assigns babies to two different groups, giving one group a new type of infant formula and the other group conventional formula, in order to study the effects of the new formula. a political scientist reviews survey data on the political views of the student population on her campus in order to study the correlation between class (freshman, sophomore, junior, senior) and political affiliation. an economist uses survey data from the bureau of labor statistics to study the relationship between age and annual salary. the issue of reverse causality is more likely to be present in data sets than in data sets.