Interpreting a Two-Proportion Confidence Interval
A study compared two treatments for anxiety, A and B. A 90% confidence interval for the difference in the true improvement rates, pA - pB, is (0.05, 0.19). A researcher claims, “Treatment A might be more effective than Treatment B, but we need more evidence.” Which of the following statements 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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