APFIVE Interpreting a Two-Proportion Confidence Interval
Two treatments for anxiety were compared. The 90% confidence interval for the difference in improvement rates (pA - pB) is (0.05, 0.19). A researcher claims that “Treatment A might be more effective than Treatment B, but we need more evidence.” Which statement best evaluates this claim?
A
The claim is supported by the confidence interval
B
The interval is too wide to draw any conclusions
C
The confidence level is too low to evaluate the claim
D
The claim is inconsistent with the confidence interval
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