                                       
 |                     |              |
 | ------------------- | ------------ |
 | Number of cylinders |         Mean |
 |                     |     Std. dev |
 |                     |      Valid N |
 |                     |            4 |
 |                     |            6 |
 |                     |            8 |
 |                     | #Total cases |
 |         Carbureuter |         Mean |
 |                     |     Std. dev |
 |                     |      Valid N |
 |                     |            1 |
 |                     |            2 |
 |                     |            3 |
 |                     |            4 |
 |                     |            6 |
 |                     |            8 |
 |                     | #Total cases |
