1          OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 72         
 73         /* basicmath.sas */
 74         title2 'Explore math data with elementary tests';
 75         %include '/home/u1407221/441s24/SAS06/ReadLabelMath.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              248.93k
       OS Memory           29604.00k
       Timestamp           02/12/2024 06:51:50 PM
       Step Count                        38  Switch Count  0
       Page Faults                       0
       Page Reclaims                     18
       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=10Feb2024:16:04:10,
       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 26 variables.
 NOTE: DATA statement used (Total process time):
       real time           0.03 seconds
       user cpu time       0.00 seconds
       system cpu time     0.00 seconds
       memory              977.00k
       OS Memory           30376.00k
       Timestamp           02/12/2024 06:51:50 PM
       Step Count                        39  Switch Count  2
       Page Faults                       0
       Page Reclaims                     147
       Page Swaps                        0
       Voluntary Context Switches        20
       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.REPLIC has 579 observations and 26 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              1156.90k
       OS Memory           30636.00k
       Timestamp           02/12/2024 06:51:50 PM
       Step Count                        40  Switch Count  2
       Page Faults                       0
       Page Reclaims                     111
       Page Swaps                        0
       Voluntary Context Switches        11
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           264
       
 
 
 NOTE: There were 1158 observations read from the data set WORK.MATH.
 NOTE: The data set WORK.EXPLORE has 579 observations and 17 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              1137.53k
       OS Memory           30636.00k
       Timestamp           02/12/2024 06:51:50 PM
       Step Count                        41  Switch Count  2
       Page Faults                       0
       Page Reclaims                     110
       Page Swaps                        0
       Voluntary Context Switches        11
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           264
       
 
 198        
 199        /* It's not the primary question, but are marks better on the precalculus
 200        items of the diagnostic test, or the calculus items? There are 9 precalculus
 201        and 11 calculus questions; convert to percentages.  */
 202        
 203        data extra;
 204             set explore;
 205             diff = (100 * precalc/9) - (100 * calc/11);
 206             label diff = 'Percentage correct: Precalc minus calc';
 207        
 
 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 205:18   
 NOTE: There were 579 observations read from the data set WORK.EXPLORE.
 NOTE: The data set WORK.EXTRA has 579 observations and 18 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              966.03k
       OS Memory           30636.00k
       Timestamp           02/12/2024 06:51:50 PM
       Step Count                        42  Switch Count  2
       Page Faults                       0
       Page Reclaims                     113
       Page Swaps                        0
       Voluntary Context Switches        11
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           272
       
 
 208        proc means n mean std t probt clm;
 209             title3 'Are pre-calculus questions easier?';
 210             var diff;
 211        
 212        /* Do the following quantitative variables have a significant linear
 213        relationship with grade? What percent of the variation does each explain?
 214             * High school GPA
 215             * High school Calculus mark
 216             * High school English mark
 217             * Number precalculus correct on diagnostic test
 218             * Number calculus correct on diagnostic test
 219             * Total number correct on diagnostic test
 220        */
 221        
 
 NOTE: There were 579 observations read from the data set WORK.EXTRA.
 NOTE: PROCEDURE MEANS used (Total process time):
       real time           0.03 seconds
       user cpu time       0.03 seconds
       system cpu time     0.01 seconds
       memory              8973.56k
       OS Memory           37068.00k
       Timestamp           02/12/2024 06:51:50 PM
       Step Count                        43  Switch Count  2
       Page Faults                       0
       Page Reclaims                     1783
       Page Swaps                        0
       Voluntary Context Switches        29
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           8
       
 
 222        proc corr nosimple;
 223             title3 'Correlations between quantitative variables';
 224             var grade hsgpa hscalc hsengl precalc calc totscore;
 225        
 
 NOTE: PROCEDURE CORR used (Total process time):
       real time           0.06 seconds
       user cpu time       0.06 seconds
       system cpu time     0.00 seconds
       memory              1463.59k
       OS Memory           31144.00k
       Timestamp           02/12/2024 06:51:51 PM
       Step Count                        44  Switch Count  1
       Page Faults                       0
       Page Reclaims                     143
       Page Swaps                        0
       Voluntary Context Switches        11
       Involuntary Context Switches      1
       Block Input Operations            0
       Block Output Operations           16
       
 
 226        proc reg plots=none;
 227             title3 'Give an equation for predicting calculus grade from HS GPA';
 228             model grade = hsgpa;
 229        
 
 NOTE: PROCEDURE REG used (Total process time):
       real time           0.03 seconds
       user cpu time       0.04 seconds
       system cpu time     0.01 seconds
       memory              2609.78k
       OS Memory           32704.00k
       Timestamp           02/12/2024 06:51:51 PM
       Step Count                        45  Switch Count  2
       Page Faults                       0
       Page Reclaims                     793
       Page Swaps                        0
       Voluntary Context Switches        22
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           72
       
 
 230        proc glm;
 231             title3 'Do average marks differ significantly in the three courses?';
 232             class class;
 233             model grade = class;
 234             /* Also, what proportion of the variation in grade is explained by
 235                course? */
 236        
 
 NOTE: PROCEDURE GLM used (Total process time):
       real time           0.34 seconds
       user cpu time       0.12 seconds
       system cpu time     0.02 seconds
       memory              22119.71k
       OS Memory           51896.00k
       Timestamp           02/12/2024 06:51:51 PM
       Step Count                        46  Switch Count  3
       Page Faults                       0
       Page Reclaims                     6096
       Page Swaps                        0
       Voluntary Context Switches        532
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           1352
       
 
 237        proc freq;
 238             title2 'Do students in the three courses have different outcomes?';
 239             tables class * (passed outcome) / nocol nopercent chisq;
 240        
 241        
 
 NOTE: There were 579 observations read from the data set WORK.EXTRA.
 NOTE: PROCEDURE FREQ used (Total process time):
       real time           0.06 seconds
       user cpu time       0.06 seconds
       system cpu time     0.00 seconds
       memory              1554.09k
       OS Memory           51632.00k
       Timestamp           02/12/2024 06:51:51 PM
       Step Count                        47  Switch Count  5
       Page Faults                       0
       Page Reclaims                     288
       Page Swaps                        0
       Voluntary Context Switches        37
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           560
       
 
 242        proc glm plots=none;
 243             title3 'Do the three courses attract different kinds of student?';
 244             class class;
 245             model hsgpa hscalc hsengl precalc calc totscore = class;
 246             means class;
 247        
 
 NOTE: PROCEDURE GLM used (Total process time):
       real time           0.22 seconds
       user cpu time       0.23 seconds
       system cpu time     0.01 seconds
       memory              2447.12k
       OS Memory           52920.00k
       Timestamp           02/12/2024 06:51:51 PM
       Step Count                        48  Switch Count  3
       Page Faults                       0
       Page Reclaims                     292
       Page Swaps                        0
       Voluntary Context Switches        24
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           472
       
 
 248        proc glm;
 249             title2 'Is there a sex dfference in average marks?';
 250             class sex;
 251             model grade = sex;
 252             means sex;
 253             /* Also, what proportion of the variation in grade is explained by
 254                sex? */
 255        
 
 NOTE: PROCEDURE GLM used (Total process time):
       real time           0.40 seconds
       user cpu time       0.16 seconds
       system cpu time     0.02 seconds
       memory              4850.15k
       OS Memory           54972.00k
       Timestamp           02/12/2024 06:51:52 PM
       Step Count                        49  Switch Count  3
       Page Faults                       0
       Page Reclaims                     1449
       Page Swaps                        0
       Voluntary Context Switches        904
       Involuntary Context Switches      1
       Block Input Operations            0
       Block Output Operations           1176
       
 
 256        proc ttest;
 257             title2 'Could we conclude NO sex difference?';
 258             class sex;
 259             var grade;
 260             /* Includes confidence interval for difference between means. */
 261        
 
 NOTE: PROCEDURE TTEST used (Total process time):
       real time           0.75 seconds
       user cpu time       0.24 seconds
       system cpu time     0.07 seconds
       memory              11140.96k
       OS Memory           61132.00k
       Timestamp           02/12/2024 06:51:52 PM
       Step Count                        50  Switch Count  49
       Page Faults                       0
       Page Reclaims                     27184
       Page Swaps                        0
       Voluntary Context Switches        1374
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           2672
       
 
 262        proc glm;
 263             title2 'Do average marks depend on mother tongue?';
 264             class tongue;
 265             model grade = tongue;
 266             means tongue;
 267             /* Also, what proportion of the variation in grade is explained by
 268                mother tongue? */
 269        
 
 NOTE: PROCEDURE GLM used (Total process time):
       real time           0.34 seconds
       user cpu time       0.17 seconds
       system cpu time     0.02 seconds
       memory              4866.37k
       OS Memory           58044.00k
       Timestamp           02/12/2024 06:51:53 PM
       Step Count                        51  Switch Count  3
       Page Faults                       0
       Page Reclaims                     1309
       Page Swaps                        0
       Voluntary Context Switches        832
       Involuntary Context Switches      2
       Block Input Operations            0
       Block Output Operations           1176
       
 
 270        proc glm;
 271             title2 'Do average marks depend on ethnic background?';
 272             class ethnic;
 273             model grade = ethnic;
 274             means ethnic;
 275             means ethnic / tukey bon scheffe;
 276             /* Also, what proportion of the variation in grade is explained by
 277                ethnic background? */
 278        
 279        run;
 
 280        quit;
 
 NOTE: PROCEDURE GLM used (Total process time):
       real time           0.61 seconds
       user cpu time       0.35 seconds
       system cpu time     0.03 seconds
       memory              5107.46k
       OS Memory           58300.00k
       Timestamp           02/12/2024 06:51:53 PM
       Step Count                        52  Switch Count  3
       Page Faults                       0
       Page Reclaims                     1775
       Page Swaps                        0
       Voluntary Context Switches        2094
       Involuntary Context Switches      1
       Block Input Operations            0
       Block Output Operations           1880
       
 
 281        
 282        
 283        OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 295