APFIVE Blocking Design And Confounding Variables
How does a blocking design in experimental research help control for confounding variables compared to a completely randomized design?
A
It randomly assigns treatments to all experimental units without considering their characteristics
B
It groups similar experimental units together, reducing variability within blocks and isolating the treatment effect
C
It eliminates all confounding variables by creating homogeneous groups
D
It increases the sample size to minimize the impact of confounding variables
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