condition mean min max ZT0-3 8.04465 8.04465 8.04465 ZT4-7 5.999874999999999 5.999874999999999 5.999874999999999 ZT8-11 2.463535 2.463535 2.463535 ZT12-15 3.02381 3.02381 3.02381 ZT16-19 12.6267 12.6267 12.6267 ZT20-23 10.8317 10.8317 10.8317