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Hypothesis test

During 2002, college work - study students earned a mean of $1252. Assume that a sample consisting of 45 of the work-study students at a large university was found to have earned a mean of $1277 during the year, with a standard deviation of $210. Would a one-tail test at the 0.05 level suggest the average earnings of this university's work-study students were significantly higher than the national mean?

Solution Summary

One-tail hypothesis test is performed.