As one part of a review of middle-manager selection procedures, a study was made of the relation between the hiring source (promoted from within, hired from related business, hired from unrelated business) and the 3-year job history (additional promotion, same position, resigned, dismissed). The data for 120 middle managers follow.

a. Compute the job-history percentages within each of the three sources.
b. Describe the relation between job history and source.
c. Use an appropriate graph to display the relation between job history and source.

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Source Job History thin Firm Related Business Unrelated Business Totul Promoted Same Position Resigned Dismissed Total 10 18 10 27 10 57 21 42 120