The manager of a warehouse would like to know how many errors are made when a product’s serial number is read by a bar-code reader. Six samples are collected of the number of scanning errors: 36, 14, 21, 39, 11, and 2 errors, per 1,000 scans each. What number of errors is made by all scans, based on these six samples?

This will be as few as and as many as errors in 1,000 scans.

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