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Evaluation of Causal Claims
Grade Level
ACT Prep
AS.089 Evaluation of Causal Claims
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Data Representation: A classroom air purifier was used during Week 2, and particle levels were lower than in Week 1. During Week 2, windows were also kept closed because of rain. Which conclusion is safest?
A
The purifier definitely caused lower particles because it was used in Week 2, when the stated controls and comparison conditions are applied.
B
The purifier may have lowered particles, but closed windows are a competing explanation.
C
The result proves rain increased indoor particles, under the conditions and evidence described in the passage.
D
Closed windows cannot affect particles because the purifier was present, for the specific setup, variables, and limits stated in the item.
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