Feedback for A clinical trial examines the proportion of patients with improved symptoms after using a new treatment. The 95% confidence interval is calculated as (0.55, 0.75). What does this mean?

I answered correctly. But it marked me as wrong!!! This is happening so often. Correct thisĀ 

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I answered correctly. But it marked me as wrong!!! This is happening so often. Correct thisĀ 

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