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A large manufacturing company investigated the service it received from suppliers and discovered that, in the past, 35% ofall materials shipments were received late. However, the company recently installed a just-in-time system in which suppliers are linked more closely to the sample of 125 deliveries since the just-in-time system was installed reveals that 25 deliveries were late Use this sample information to test whether the proportion of late deliveries was reduced significantly Let α ,-05.
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