A researcher wishes to compare the height (cm) of four plant varieties within a

greenhouse. The greenhouse has six benches and each bench can accommodate 4 pots.

The sunlight streaming in the greenhouse is not constant. Using one pot as an

experimental unit, design an experiment to show these facts. Ensure that you:

(a) Name the experimental design and the reason(s) for your choice.

(b) Give a diagrammatic representation of your design.

(c) List the sources of variation and their degrees of freedom.

(d) Write null and alternate hypotheses.

(e) State the target population