The general manager of an engineering firm wants to know
whether a draftsmans experience influences the quality of his work. She
selects 24 draftsmen at random and records their years of work experience and
their quality rating (as assessed by their supervisors, where 5 = Excellent, 4
= Very good, 3 = Average, 2 = Fair, and 1 = Poor). The data are listed here. Can
we infer from these data that years of work experience is a factor in
determining the quality of work performed? (Use _ = .05.)
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