View source for Experimental design diagram

{{Notability||date=August 2023}}{{More citations needed|date=August 2007}}

'''Experimental Design Diagram (EDD)''' is a [[diagram]] used in science to [[Design of experiments|design]] an [[experiment]]. This diagram helps to identify the essential components of an experiment. It includes a title, the research [[hypothesis]] and null hypothesis, the [[independent variable]], the levels of the independent variable, the number of trials, the [[dependent variable]], the operational definition of the [[dependent variable]] and the [[constant (mathematics)|constant]]s.<ref>
{| class="wikitable"
|-
| Title || The Effect of Different-Aged Compost on Bean Growth || ||
|-
| Hypothesis || If older compost is applied, then plant growth will be increased, because.... || ||
|-
| Independent Variable  || Age of Compost || ||
|-
| Levels of IV|| 3-month-old Compost || 6-month-old compost || No compost
|-
| Repeated Trials || 25 plants || 25 plants || 25 plants
|-
| Dependent Variable || Height of Plants (cm) || ||
|-
| Constants || Amount of light; Amount of water; Amount of compost || ||
|}
Students and Research: Practical Strategies for Science Classrooms and Competitions, 3rd Edition, by Cothron, Giese, & Rezba (2000). Kendall/Hunt Publishing</ref>

==References==
{{reflist}}

[[Category:Design of experiments]]


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