A study was conducted to determine how effective the medication Avandia is at preventing diabetes in those who are at risk for the disease but do not have it yet. Randomly selected non-diabetic patients at risk for diabetes were given Avandia for several months. At the end of the study, each patient was tested for diabetes. Researchers wanted to estimate the true percentage of patients that develop diabetes while taking Avandia. Which confidence interval would be most appropriate for this study?

Question 4 options:

, whenis known

, whenis unknown

The true mean of the differences, for paired data

The difference between two means, using independent samples

One proportion

Two proportions