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packages are randomly selected from packages received by a parcel service. The sample has a mean weight of22.1 pounds. Assume that=2.0pounds. What is the95%confidence interval

packages are randomly selected from packages received by a parcel service. The sample has a mean weight of22.1 pounds. Assume that=2.0pounds. What is the95%confidence interval for the true mean weight,,of all packages received by the parcel service?

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