1          OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 72         
 73         /* mathlogreg4.sas */
 74         
 75         %include '/home/u1407221/441s24/SAS08/ReadLabelMath2.sas';
 NOTE: Format YNFMT is already on the library WORK.FORMATS.
 NOTE: Format YNFMT has been output.
 NOTE: Format CRSFMT is already on the library WORK.FORMATS.
 NOTE: Format CRSFMT has been output.
 NOTE: Format NFMT is already on the library WORK.FORMATS.
 NOTE: Format NFMT has been output.
 NOTE: Format NCFMT is already on the library WORK.FORMATS.
 NOTE: Format NCFMT has been output.
 
 NOTE: PROCEDURE FORMAT used (Total process time):
       real time           0.00 seconds
       user cpu time       0.00 seconds
       system cpu time     0.00 seconds
       memory              250.50k
       OS Memory           28836.00k
       Timestamp           03/10/2024 07:59:33 PM
       Step Count                        123  Switch Count  0
       Page Faults                       0
       Page Reclaims                     26
       Page Swaps                        0
       Voluntary Context Switches        0
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           32
       
 
 
 NOTE: The infile '/home/u1407221/441s24/data/math.data.txt' is:
       Filename=/home/u1407221/441s24/data/math.data.txt,
       Owner Name=u1407221,Group Name=oda,
       Access Permission=-rw-r--r--,
       Last Modified=10Feb2024:17:04:10,
       File Size (bytes)=90324
 
 NOTE: 1158 records were read from the infile '/home/u1407221/441s24/data/math.data.txt'.
       The minimum record length was 76.
       The maximum record length was 76.
 NOTE: Missing values were generated as a result of performing an operation on missing values.
       Each place is given by: (Number of times) at (Line):(Column).
       180 at 121:24   
 NOTE: The data set WORK.MATH has 1158 observations and 37 variables.
 NOTE: DATA statement used (Total process time):
       real time           0.00 seconds
       user cpu time       0.01 seconds
       system cpu time     0.00 seconds
       memory              1183.40k
       OS Memory           29608.00k
       Timestamp           03/10/2024 07:59:33 PM
       Step Count                        124  Switch Count  2
       Page Faults                       0
       Page Reclaims                     162
       Page Swaps                        0
       Voluntary Context Switches        17
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           784
       
 
 
 NOTE: There were 1158 observations read from the data set WORK.MATH.
 NOTE: The data set WORK.REPLIC has 579 observations and 37 variables.
 NOTE: DATA statement used (Total process time):
       real time           0.00 seconds
       user cpu time       0.00 seconds
       system cpu time     0.00 seconds
       memory              1412.18k
       OS Memory           29996.00k
       Timestamp           03/10/2024 07:59:33 PM
       Step Count                        125  Switch Count  2
       Page Faults                       0
       Page Reclaims                     154
       Page Swaps                        0
       Voluntary Context Switches        13
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           520
       
 
 
 NOTE: There were 1158 observations read from the data set WORK.MATH.
 NOTE: The data set WORK.EXPLORE has 579 observations and 28 variables.
 NOTE: DATA statement used (Total process time):
       real time           0.00 seconds
       user cpu time       0.01 seconds
       system cpu time     0.00 seconds
       memory              1408.96k
       OS Memory           29996.00k
       Timestamp           03/10/2024 07:59:33 PM
       Step Count                        126  Switch Count  2
       Page Faults                       0
       Page Reclaims                     130
       Page Swaps                        0
       Voluntary Context Switches        10
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           520
       
 
 236        title2 'Prediction for the replication sample';
 237        
 238        /* Where should we draw the line, and predict that the student will pass?
 239           In the exploratory sample, 52.68% passed overall, so find the
 240           pihat that cuts off the bottom 52.68%, and use that as a cutoff.
 241           There was a pihat right at the 52.68th percentile: 0.4063743825.
 242           If pihat > 0.406, predict the student will pass. For the record and
 243           before peeking, I predict 75% correct. */
 244        
 245        data mathrep;
 246             set replic;
 247             if hsgpa+hscalc+precalc = . then missused = 1 ;
 248                else missused = 0;
 249             label missused   = 'Any of hsgpa hscalc precalc missing';
 250             format missused ynfmt.;
 251             /* Pi-hat when predictors are not missing, from mathlogreg2 results */
 252             b0 = -14.7970; b1 = 0.1173; b2 = 0.0638; b3 = 0.2989;
 253             L = b0 + b1*hsgpa + b2*hscalc + b3*precalc;
 254             pihat = exp(L)/(1+exp(L));
 255             if missused=1 then pihat = 0.348;
 256             if pihat > 0.406 then Prediction = 'Pass    ';
 257             else Prediction = 'Not Pass';
 258        
 259        /* Check commented out
 260        proc means;
 261             title3 'Checking Prediction Variable: pihat > 0.406';
 262             class Prediction;
 263             var pihat;
 264        */
 265        
 
 NOTE: Missing values were generated as a result of performing an operation on missing values.
       Each place is given by: (Number of times) at (Line):(Column).
       127 at 247:14   186 at 247:21   97 at 253:17    30 at 253:28    59 at 253:40    186 at 254:14   186 at 254:23
       186 at 254:24   
 NOTE: There were 579 observations read from the data set WORK.REPLIC.
 NOTE: The data set WORK.MATHREP has 579 observations and 45 variables.
 NOTE: DATA statement used (Total process time):
       real time           0.00 seconds
       user cpu time       0.00 seconds
       system cpu time     0.00 seconds
       memory              1328.43k
       OS Memory           29868.00k
       Timestamp           03/10/2024 07:59:33 PM
       Step Count                        127  Switch Count  2
       Page Faults                       0
       Page Reclaims                     130
       Page Swaps                        0
       Voluntary Context Switches        10
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           528
       
 
 266        proc freq data = mathrep;
 267             title2 'How good is the prediction?';
 268             tables Prediction*passed / nocol;
 269        
 
 NOTE: There were 579 observations read from the data set WORK.MATHREP.
 NOTE: PROCEDURE FREQ used (Total process time):
       real time           0.04 seconds
       user cpu time       0.04 seconds
       system cpu time     0.01 seconds
       memory              3586.40k
       OS Memory           30640.00k
       Timestamp           03/10/2024 07:59:33 PM
       Step Count                        128  Switch Count  5
       Page Faults                       0
       Page Reclaims                     306
       Page Swaps                        0
       Voluntary Context Switches        27
       Involuntary Context Switches      1
       Block Input Operations            0
       Block Output Operations           536
       
 
 270        proc iml;
 NOTE: IML Ready
 271             PercentCorrect = 35.75 + 34.54;
 272             print PercentCorrect;
 273        
 274        /* Prediction may be better at the extremes. */
 275        
 NOTE: Exiting IML.
 NOTE: PROCEDURE IML used (Total process time):
       real time           0.00 seconds
       user cpu time       0.01 seconds
       system cpu time     0.00 seconds
       memory              691.93k
       OS Memory           30116.00k
       Timestamp           03/10/2024 07:59:33 PM
       Step Count                        129  Switch Count  0
       Page Faults                       0
       Page Reclaims                     207
       Page Swaps                        0
       Voluntary Context Switches        0
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           0
       
 
 276        proc freq data = mathrep;
 277             tables pihat*passed / norow nocol nopercent;
 278        run;
 
 NOTE: There were 579 observations read from the data set WORK.MATHREP.
 NOTE: PROCEDURE FREQ used (Total process time):
       real time           0.66 seconds
       user cpu time       0.66 seconds
       system cpu time     0.00 seconds
       memory              4063.12k
       OS Memory           33456.00k
       Timestamp           03/10/2024 07:59:34 PM
       Step Count                        130  Switch Count  4
       Page Faults                       0
       Page Reclaims                     760
       Page Swaps                        0
       Voluntary Context Switches        28
       Involuntary Context Switches      1
       Block Input Operations            0
       Block Output Operations           864
       
 
 279        quit;
 280        
 281        
 282        OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 294