The TTEST Procedure
 
Variable:  extra
| 10 | 0.7500 | 1.7890 | 0.5657 | -1.6000 | 3.7000 | 
| 10 | 2.3300 | 2.0022 | 0.6332 | -0.1000 | 5.5000 | 
|  | -1.5800 | 1.8986 | 0.8491 |  |  | 
|  | -1.5800 |  | 0.8491 |  |  | 
 
 
| 0.7500 | -0.5298 | 2.0298 | 1.7890 | 1.2305 | 3.2660 | 
| 2.3300 | 0.8977 | 3.7623 | 2.0022 | 1.3772 | 3.6553 | 
| -1.5800 | -3.3639 | 0.2039 | 1.8986 | 1.4346 | 2.8077 | 
| -1.5800 | -3.3655 | 0.2055 |  |  |  | 
 
 
| Equal | 18 | -1.86 | 0.0792 | 
| Unequal | 17.776 | -1.86 | 0.0794 | 
 
 
 
The TTEST Procedure
 
Variable:  extra
| 20 | 1.5400 | 2.0179 | 0.4512 | -1.6000 | 5.5000 | 
 
 
| 1.5400 | 0.5956 | 2.4844 | 2.0179 | 1.5346 | 2.9473 | 
 
 
 
The TTEST Procedure
 
Difference:  extra_2 - extra_1
| 10 | 1.5800 | 1.2300 | 0.3890 | 0 | 4.6000 | 
 
 
| 1.5800 | 0.7001 | 2.4599 | 1.2300 | 0.8460 | 2.2455 |