OPTIONS LS=75 PS=60;

DATA a;

  INFILE 'oring.dat' MISSOVER ;
  
  INPUT n_rings   /*Number of O-rings at risk on a given flight */
        n_e       /*Number with primary o-ring erosion          */
        n_e_b     /*Number with primary o-ring erosion/blowby   */
        temp      /*Launch temperature (degrees F)              */
        pressure  /*Leak-check pressure (psi)                   */ 
        flightno  /*Temporal order of flight                    */
;
 
PROC logistic;
  model n_e/n_rings = temp pressure / corrb; 

RUN;