condition mean min max ZT0-3 16.9577 16.9577 16.9577 ZT4-7 14.345199999999998 14.345199999999998 14.345199999999998 ZT8-11 22.8002 22.8002 22.8002 ZT12-15 21.6423 21.6423 21.6423 ZT16-19 20.88355 20.88355 20.88355 ZT20-23 22.847749999999998 22.847749999999998 22.847749999999998