The original ESL data set contains 488 profiles of applicants for certain industrial
jobs. Expert psychologists of a recruiting company, based upon psychometric
test results and interviews with the candidates, determined the values of the
input attributes. The output is the an overall score corresponding to the
degree of fitness of the candidate to this type of job.
Here classes 1-3 are merged to one group and all classes >6 are merged to one group.
Furtheremore, the data is relabeled to start at 0 and only 20 samples per class are
included.