APFIVE Experimental Design Factors and Treatments
In an experiment on plant growth, researchers manipulate light exposure (full sun, partial shade, full shade) and soil type (clay, loam, sandy). One group of plants receives no water as a control condition. Which statement correctly describes the experimental design?
A
The control group establishes a proper baseline
B
There are 2 explanatory variables with 9 treatments
C
The design is flawed; water is an uncontrolled variable
D
There are 3 explanatory variables with 10 treatments
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