Evaluating Fertilizer Effects on Plant Growth

In an experiment designed to evaluate the effects of a new fertilizer on plant growth, researchers planted seeds of the same species in three distinct groups: Group A received no fertilizer, Group B received a low concentration of the new fertilizer, and Group C received a high concentration of the new fertilizer. Over a four-week period, the researchers measured the average height of the plants in each group weekly. The results showed that Group C plants grew significantly taller than the other two groups by the end of the experiment, while Group A plants showed little to no growth.

To determine the effectiveness of the fertilizer, researchers created a graph plotting the average height of plants over the four weeks. The graph displayed a steady increase in the average height of Group B and a rapid increase for Group C, while Group A remained constant. Based on these results, what conclusion can most accurately be drawn regarding the effectiveness of the fertilizer?