How might you use conditional probabilities to determine if an ADDSC cutoff score in

Appendix D of 66 is predictive of whether or not a person will drop out of school?

Appendix D

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ADDSC GENDER REPEAT IQ ENGL ENGG GPA SOCPROB DROPOUT Average of three ADD-like behavior scores 1 = male; 2 = female 1 = repeated at least one grade; 0 = did not repeat IQ obtained from a group-administered IQ test Level of English in ninth grade: 1 = college prep; 2 = general; 3 = remedial Grade in English in ninth grade: 4 = A, etc. Grade point average in ninth grade Social problems in ninth grade: 1 = yes; 0 = no 1 = dropped out before completing high school; 0 = did not drop out