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Mathematics, 10.04.2022 21:40 taheraitaldezign

The port and Customs authorities at Cape Town harbour claim that imported textile consignments are cleared within an average of 72 hours of the goods being offloaded from a vessel. A local textile importer is not convinced of this, and believes that the average clearance time is much longer. He analysed documents of 46 recent consignments and found that the average clearance time was 75.9 hours. Assume a population standard deviation of 18 hours and that clearance time is approximately normally distributed.

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