15.73 Rating Teaching Applicants Before filling several new teaching positions at the high school, the principal formed a review board consisting of five teachers who were asked to interview the 12 applicants and rank them in order of merit. Seven of the 12 applicants held university degrees but had limited teaching experience. Of the remaining five applicants, all had university degrees and substantial experience. The review board's rankings are given in the table.

Do these rankings indicate that the review board con- siders experience a prime factor in the selection of the best candidates? Test using a = 0.05.

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Limited Experience Substantial Experience 4 6 7 9 10 11 =2 12 2 12358 8