1          OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 70         
 71         /* MathReg2.sas  */
 72         %include '/home/brunner0/441s20/readmath2b.sas'; /* Creates data table mathex */
 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: PROCEDURE FORMAT used (Total process time):
       real time           0.00 seconds
       user cpu time       0.00 seconds
       system cpu time     0.00 seconds
       memory              244.06k
       OS Memory           31652.00k
       Timestamp           02/01/2020 09:52:11 PM
       Step Count                        43  Switch Count  0
       Page Faults                       0
       Page Reclaims                     25
       Page Swaps                        0
       Voluntary Context Switches        0
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           32
       
 
 176        title2 'Residual analysis';
 177        
 
 NOTE: The infile '/home/brunner0/441s20/exploremath.data.txt' is:
       Filename=/home/brunner0/441s20/exploremath.data.txt,
       Owner Name=brunner0,Group Name=oda,
       Access Permission=-rw-r--r--,
       Last Modified=26Jan2020:18:49:34,
       File Size (bytes)=44583
 
 NOTE: 579 records were read from the infile '/home/brunner0/441s20/exploremath.data.txt'.
       The minimum record length was 75.
       The maximum record length was 75.
 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).
       99 at 95:24    99 at 134:13   
 NOTE: The data set WORK.MATHEX has 579 observations and 34 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              880.62k
       OS Memory           32168.00k
       Timestamp           02/01/2020 09:52:11 PM
       Step Count                        44  Switch Count  3
       Page Faults                       0
       Page Reclaims                     133
       Page Swaps                        0
       Voluntary Context Switches        25
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           520
       
 
 178        proc reg plots(only) = ResidualPlot data=mathex;
 179             title3 'Model H: hsgpa hscalc hsengl totscore';
 180             model grade = hsgpa hscalc hsengl totscore;
 181             output out = Explor predicted = yhat
 182                                 residual  = resid
 183                                 rstudent  = delstud;
 184                                          /* Deleted Studentized Residual */
 185        
 186        /* Could have included LCL and UCL for upper and lower limits of a
 187           95% prediction interval for each case in the file */
 188        
 189        
 190        /* What is a big (Studentized deleted) residual? If the model is correct,
 191           each one has a t distribution with n-p-1 = 283 df (practically standard
 192           normal), so the Studentized deleted residual can be treated directly as
 193           a t-test statistic. Values that are too big in absolute value will cause
 194           rejection of the null hypothesis that x_i*beta is the same for this case
 195           and the other n-1 cases. Tests are NOT independent, but use a Bonferroni
 196           correction for n = 289 tests. Get the critical value from proc iml. */
 197        
 
 NOTE: The data set WORK.EXPLOR has 579 observations and 37 variables.
 NOTE: PROCEDURE REG used (Total process time):
       real time           0.37 seconds
       user cpu time       0.16 seconds
       system cpu time     0.02 seconds
       memory              19480.59k
       OS Memory           47556.00k
       Timestamp           02/01/2020 09:52:11 PM
       Step Count                        45  Switch Count  4
       Page Faults                       0
       Page Reclaims                     4195
       Page Swaps                        0
       Voluntary Context Switches        273
       Involuntary Context Switches      1
       Block Input Operations            0
       Block Output Operations           1600
       
 
 198        proc iml;
 NOTE: IML Ready
 199             title3 'Critical value for Joint t-test on Studentized Residuals';
 200             Alpha = 0.05/289;
 200      !                        print Alpha;
 201             Critval = tinv(1-Alpha/2,283);
 201      !                                     print Critval;
 202        
 NOTE: Exiting IML.
 NOTE: PROCEDURE IML used (Total process time):
       real time           0.03 seconds
       user cpu time       0.04 seconds
       system cpu time     0.00 seconds
       memory              1010.21k
       OS Memory           45952.00k
       Timestamp           02/01/2020 09:52:12 PM
       Step Count                        46  Switch Count  1
       Page Faults                       0
       Page Reclaims                     267
       Page Swaps                        0
       Voluntary Context Switches        10
       Involuntary Context Switches      1
       Block Input Operations            0
       Block Output Operations           176
       
 
 203        proc univariate normal plot;
 204             var delstud;
 205        
 206        /* Tests for normality indicate residuals are not normal. No st resids
 207        greater than critical value. Next, a few more plots. */
 208        
 
 NOTE: PROCEDURE UNIVARIATE used (Total process time):
       real time           0.27 seconds
       user cpu time       0.15 seconds
       system cpu time     0.00 seconds
       memory              3807.84k
       OS Memory           47452.00k
       Timestamp           02/01/2020 09:52:12 PM
       Step Count                        47  Switch Count  0
       Page Faults                       0
       Page Reclaims                     567
       Page Swaps                        0
       Voluntary Context Switches        292
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           528
       
 
 209        proc sgplot;
 210             title3 'Plot of Y-hat by Y';
 211             scatter y=grade x=yhat;
 212        
 
 213        proc sgplot;
 NOTE: PROCEDURE SGPLOT used (Total process time):
       real time           0.15 seconds
       user cpu time       0.06 seconds
       system cpu time     0.01 seconds
       memory              1531.93k
       OS Memory           47408.00k
       Timestamp           02/01/2020 09:52:12 PM
       Step Count                        48  Switch Count  2
       Page Faults                       0
       Page Reclaims                     330
       Page Swaps                        0
       Voluntary Context Switches        197
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           536
       
 NOTE: There were 579 observations read from the data set WORK.EXPLOR.
 
 214             title3 'Calculus sub-test by deleted studentized residual';
 215             scatter x=calc y=delstud;
 216        
 
 217        proc sgplot;
 NOTE: PROCEDURE SGPLOT used (Total process time):
       real time           0.14 seconds
       user cpu time       0.05 seconds
       system cpu time     0.00 seconds
       memory              2551.56k
       OS Memory           47920.00k
       Timestamp           02/01/2020 09:52:12 PM
       Step Count                        49  Switch Count  2
       Page Faults                       0
       Page Reclaims                     392
       Page Swaps                        0
       Voluntary Context Switches        196
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           560
       
 NOTE: There were 579 observations read from the data set WORK.EXPLOR.
 
 218             title3 'Pre-calculus sub-test by deleted studentized residual';
 219             scatter x=precalc y=delstud;
 220        
 
 221        proc sgplot;
 NOTE: PROCEDURE SGPLOT used (Total process time):
       real time           0.12 seconds
       user cpu time       0.06 seconds
       system cpu time     0.01 seconds
       memory              2281.15k
       OS Memory           47920.00k
       Timestamp           02/01/2020 09:52:12 PM
       Step Count                        50  Switch Count  2
       Page Faults                       0
       Page Reclaims                     305
       Page Swaps                        0
       Voluntary Context Switches        198
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           552
       
 NOTE: There were 579 observations read from the data set WORK.EXPLOR.
 
 222             title3 'Mother tongue by deleted studentized residual';
 223             scatter x=mtongue y=delstud;
 224        
 225        quit;
 
 NOTE: PROCEDURE SGPLOT used (Total process time):
       real time           0.14 seconds
       user cpu time       0.05 seconds
       system cpu time     0.00 seconds
       memory              2277.37k
       OS Memory           47920.00k
       Timestamp           02/01/2020 09:52:12 PM
       Step Count                        51  Switch Count  2
       Page Faults                       0
       Page Reclaims                     289
       Page Swaps                        0
       Voluntary Context Switches        197
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           536
       
 NOTE: There were 579 observations read from the data set WORK.EXPLOR.
 
 226        
 227        OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 238