Suppose I want to use a test to help predict who will quit their jobs before the end of the three-month probation period. 100 new applicants are hired and the test is adminstered to all of them on the first day. Half of them quit before the end of the three month probation period. Discriminant function analysis is used to determin if the test is useful. The chi-square is significant and the success rate of predicting the 'quitters' versus the 'stayers' is 80% what would be the conclusion?