T-Test
Notes

 Output Created                               05-AUG-2026 12:35:10              
 Comments                                                                       
 Input         Data                           D:\opencode\spss-studio-mcp\examp 
                                              les\data\experiment_study.sav     
               Filter                         <none>                            
               Weight                         <none>                            
               Split File                     <none>                            
               N of Rows in Working Data File 120                               
 Missing Value Definition of Missing          User defined missing values are   
 Handling                                     treated as missing.               
               Cases Used                     Statistics for each analysis are  
                                              based on the cases with no        
                                              missing or out-of-range data for  
                                              any variable in the analysis.     
 Syntax                                       T-TEST PAIRS=pretest WITH         
                                              posttest (PAIRED).                
                                                                                
 Resources     Processor Time                 00:00:00.00                       
               Elapsed Time                   00:00:00.02                       

D:\opencode\spss-studio-mcp\examples\data\experiment_study.sav
Paired Samples Statistics

                   Mean    N   Std. Deviation Std. Error Mean 
 Pair 前测成绩 61.1417 120 11.79039       1.07631         
 1    后测成绩 71.0250 120 13.43297       1.22626         

Paired Samples Correlations

                                    N   Correlation Significance            
                                                    One-Sided p Two-Sided p 
 Pair 1 前测成绩 & 后测成绩 120 .784        .000        .000        

Paired Samples Test

               Paired Differences                   t       df  Significance    
               Mean    Std.    Std.  95% Confidence             One-Sid Two-Sid 
                       Deviati Error Interval of                                
                       on      Mean  the Difference                             
                                     Lower  Upper               ed p    ed p    
 Pair 1 前测成绩 -9.8833 8.43481 .7699 -11.40 -8.3586 -12.836 119 .000    .000    
        -      3               9     799    8                                   
        后测成绩                                                                  

