Question

Identify the independent variable, dependent variable, and constants.

1) Water, Soil, and Sunlight
2) Fertilizer Brand / Nutrients
3) Plant Height

Answer 1

One must start with a hypothesis. In this case it is that plant growth is affected by fertilizer.

Step-by-step explanation:

The dependent variable is plant growth. It is important that the plant are all the same, and there needs to be enough of them to achieve statistical significance. Before hand, You estimate the variability in plant growth and decide what level of significance you want to achieve. For example, you want to draw conclusions with 95% confidence. The independent variable is the fertilizer used ott (over the top) withheld. There needs to be a control group without fertilizer treated exactly as the group with fertilizer.