Question: Firm A ' s inventory contains 2 , 0 0 0 items, firm B ' s inventory contains 5 , 0 0 0 items, and
Firm As inventory contains items, firm Bs inventory contains items, and firm Cs inventory contains items. The population standard deviation for the cost of the items in each firm's inventory is
A statistical consultant recommends that each firm take a sample of items from its inventory to provide statistically valid estimates of the average cost per item.
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