Mathematics, 28.06.2019 20:00 blackjack73

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. how do the mean and standard deviation change, based on all 12 samples?

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