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cable company reports that the mean salary of its customers across the country is $91,600. To see how this compares, the manager of a local cable company surveys 28 randomly selected local customers and finds that their average income is $88,500.

If the standard deviation is $10,000, can the cable manager conclude that there is a difference? Test at alpha = 0.10.

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  • Category:- Statistics and Probability
  • Reference No.:- M9415869

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