Table 4: The computing time for each level and for the response mean and variance compared with the total time.

Time (sec.)Order of integrals

Level 00.0410
Level 10.0151
Level 20.291 & 2
Level 30.821 & 2 & 3
Level 419.551 & 2 & 3 & 4
0.00290
0.161 & 2 & 3

Total time20.88