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32 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 14.5 pounds with = 2.1 pounds.

32 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 14.5 pounds with = 2.1 pounds. What is the 95 percent confidence interval for the true mean weight, "u", of all packages received by the parcel service

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