Western Mine Engineering, Inc.

Western Mine Engineering, Inc. provides considerable data on mining operations at its website. For example, for 2001 there was sample data on 194 U.S. mines, 77 of which were union mines. Of the 58 union mines at which there was a wage increase, the average increase was 2.4%. Of the 70 non-union mines at which there was a wage increase, the average increase was 2.7%. Would it be possible to test whether the wage increase was equal for 2001 for the two types of mines using one of the methods given in this chapter? Why or why not? If possible, perform the test and draw a conclusion.

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