A labor management organization wants to study the problems of workers displaced by automation in three industries. Case reports for 100 workers in each industry

A labor management organization wants to study the problems of workers displaced by automation in three industries. Case reports for $\mathrm{100}$ workers in each industry whose loss of job was directly attributable to technological advances are selected. For each worker, thelocation of their subsequent job was determined. This is a test of homogeneity.