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41packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 23.1 pounds. Assume that =3.7 pounds. What

41packages are randomly selected from packages received by a parcel service. The sample has a mean weight of

23.1

pounds. Assume that

=3.7

pounds. What is the

95%

confidence interval for the true mean weight,

, of all packages received by the parcel service?

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