Suppose that, in order to estimate the proportion of students who wear glasses, a sample of 100 students was collected and showed that 20 of the students in the sample wore glasses. a confidence interval for the population proportion of students who wear glasses is given by:.200 + / - 3.000 (.040) or. 080 to. 320. (note that the standard error is. 040.) what is the confidence level of this confidence interval?
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