The state of Ohio Department of Education has a mandated ninth‐grade proficiency

The state of Ohio Department of Education has a mandated ninth‐grade proficiency test that covers writing, reading, mathematics, citizenship (social studies), and science. The Excel file Ohio Education Performance provides data on success rates (defined as the percentage of students passing) in school districts in the greater Cincinnati metropolitan area along with state averages. Find 50% and 90% probability intervals centered on the median for each of the variables in the data.

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