Confidence Interval and Causation
A 95% confidence interval for pₐ - pᵦ, the difference in the proportions of patients experiencing side effects for Medication A versus Medication B, is (0.01, 0.09). Based on this interval, a researcher claims that Medication A causes more side effects than Medication B. Which statement best evaluates this claim?
A
The claim about a higher proportion is supported, but causation cannot be inferred.
B
The claim is fully supported by the confidence interval.
C
The claim is invalid because the interval is too narrow.
D
The claim is invalid because the difference could be zero.
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