Question: As a first step, the store seeks to estimate the percentage of pricing errors. The internal auditors take a simple random sample of 28 line

As a first step, the store seeks to estimate the percentage of pricing errors. The internal auditors take a simple random sample of 28 line items from their inventory of 8,000 line items. The percentage of overpriced items in the sample is 3.6%, and the percentage of underpriced items in the sample is 7.1%.

A conservative 78% confidence interval for the percentage of line items in the store that are priced incorrectly would extend from (Q21)(low) to (Q22)(high).

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