Question: Example: In a study of store checkout scanners, 1234 items were checked and 20 of them were found to be overcharges. Using the sample data,

Example: In a study of store checkout scanners, 1234 items were checked and 20 of them were found to be overcharges.

Using the sample data, construct a 95% confidence interval for the proportion of all items that would lead to an overcharge.

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