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A meat packer is investigating the marked mass shown on Vienna sausages. A pilot study showed a mean of 11.8kg per pack and a standard

A meat packer is investigating the marked mass shown on Vienna sausages. A pilot study showed a mean of 11.8kg per pack and a standard deviation of 0.7kg. How many packs should be sampled in order to be 98% confident that the sample mean will differ by at most 0.2kg?

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