Analysis Using SPSS 

 Main Procedure is:

 Start® All Programs ® SPSS for Windows® SPSS 15.0/ SPSS13.0/ SPSS10.0 (based on the version available on your machine)   ® Enter data in Data Editor ® Analyze ® GLM ® Univariate  ® calories ® [puts Calories  under Dependent list: ] ® blk® [put blk under Fixed Factor(s): ]   trt ® [put trt under Fixed Factor(s):]  Continue ® Model... [Opens Model dialogue box] ® Custom ® Build Term(s) ® Main effects  ®   [puts blk, trt under Model: ] ® Continue ® OK. 

For performing analysis, input the data in the following format.  Here we call the block as BLK and treatment as TRT.  

Following are the brief description of the steps along with screen shots.

· Open Data editor: Start® All Programs® SPSS for Windows® SPSS 15.0/ SPSS13.0/ SPSS10.0.

· Enter data in SPSS Data editor. There are two views in SPSS Data Editor. In variable view, one can define the name of variables and variable types string or numeric and data view gives the spreadsheet in which data pertaining to variables may be entered in respective columns. In the present case, we enter data in numeric format.  

 ·Once the data entry is complete, Choose Analyze from the Menu Bar. Now select Analyze → General linear Model  → Univariate.

      · This selection displays the following screen

 · Select calories and send it to the Dependent Variable box; blk and trt may be selected for  Fixed
        Factor(s) box. After doing these the dialog box should be like this.

·  Now define model as per design adopted to analyze the data. A Click on the model displays Univariate:
           Model dialog box. Click on custom then change the Build Terms as Main effects and send trt(F) and
           blk(F) to the Model box. One gets the following screen. 

To test whether there is any significant difference between the average effect of 1^st two treatments and the average effect of the 

remaining 5 treatments. We have to write the treatment contrast in the syntax editor as follows.
             /Lmatrix 'treatment 1,2 vs treatment 3,4,5,6,7' trt -5 -5 2 2 2 2 2;

To compare the treatment 3,4,5,6,7 among themselves we have to write the treatment contrast in the syntax editor as follows.
             /Lmatrix 'within treatment 3,4,5,6,7' trt 0 0 1 -1 0 0 0;
                                                                    trt 0 0 1 1 -2 0 0;
                                                                    trt 0 0 1 1 1 -3 0;
                                                                    trt 0 0 1 1 1 1 -4;
For making all possible pairwise comparisons, we have to write 21 elementary treatment contrasts in the syntax editor.
All these contrast should be defined in the syntax editor as follows.

/Lmatrix '1 vs 2' trt 1 -1 0 0 0 0 0;
/Lmatrix '1 vs 3' trt 1 0 -1  0 0 0 0;
/Lmatrix '1 vs 4' trt 1 0 0 -1  0 0 0;
/Lmatrix '1 vs 5' trt 1 0 0 0 -1  0 0;
/Lmatrix '1 vs 6' trt 1 0 0 0 0 -1  0;
/Lmatrix '1 vs 7' trt 1 0 0 0 0 0  -1;
/Lmatrix '2 vs 3' trt  0 1 -1 0 0 0 0;
/Lmatrix '2 vs 4' trt  0 1 0 -1 0 0 0;
/Lmatrix '2 vs 5' trt  0 1 0 0 -1 0 0;
/Lmatrix '2 vs 6' trt  0 1 0 0 0 -1 0;
/Lmatrix '2 vs 7' trt  0 1 0 0 0 0 -1;
/Lmatrix '3 vs 4' trt  0 0 1 -1 0 0 0;
/Lmatrix '3 vs 5' trt  0 0 1 0 -1 0 0;
/Lmatrix '3 vs 6' trt  0 0 1 0 0 -1 0;
/Lmatrix '3 vs 7' trt  0 0 1 0 0 0 -1;
/Lmatrix '4 vs 5' trt  0 0 0 1 -1 0 0;
/Lmatrix '4 vs 6' trt  0 0 0 1 0 -1 0;
/Lmatrix '4 vs 7' trt  0 0 0 1 0 0 -1;
/Lmatrix '5 vs 6' trt  0 0 0 0 1 -1 0;
/Lmatrix '5 vs 7' trt  0 0 0 0 1 0 -1;
/Lmatrix '6 vs 7' trt  0 0 0 0 0 1 -1;

The following window will come.