Effects of Fertilizer on Plant Height

Medium Data Representation Interpreting Experimental Data

In a controlled experiment aimed at determining the effect of fertilizer on plant growth, researchers divided 50 identical potted plants into five groups: one group received no fertilizer (control), and the other four groups received increasing concentrations of fertilizer (5g, 10g, 15g, and 20g). Over four weeks, the total height of plants in each group was measured weekly. At the end of the experiment, the average height (in centimeters) of each group was recorded in the table below:

Fertilizer (g)	Average Height (cm)
0	30
5	35
10	40
15	45
20	42

Based on these results, which of the following statements is supported by the data?

Applying fertilizer consistently increases average plant height up to 15g.

The highest average plant height was achieved with 20g of fertilizer.

The control group showed greater average plant height than all experimental groups.

There is a direct correlation between fertilizer amount and plant growth.

Hint

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