Question: A researcher reported that a confidence interval for the proportion of adults whose weight decreased by the end of Ramadan is (12.16%, 27.84%) based on

A researcher reported that a confidence interval for the proportion of adults whose weight decreased by the end of Ramadan is (12.16%, 27.84%) based on a random sample of 100 adults. However, the researcher neglected to report what confidence level has been used for constructing this interval. Based on the above information, what was the confidence level?

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