Question

A farmer divided his piece of land into 2 equivalent groups and the quality of the soil is the same in both of these groups. He used fertilizers for the first group of land. He did not use fertilizers for the second group of land. At the end of the season, he measured the yield of the crops in these 2 groups. Is the study observational or experimental

Answer 1

1. Observational would mean that he (farmer) has no direct impact or change on the statistical study.
2. Experiment would mean that he imposed a certain treatment up a group in this case it would be the land.
3. Hence we can determine that the the study was an experimental one.