condition mean min max ZT0-3 4.321054999999999 4.321054999999999 4.321054999999999 ZT4-7 5.487255 5.487255 5.487255 ZT8-11 5.55273 5.55273 5.55273 ZT12-15 3.492045 3.492045 3.492045 ZT16-19 2.70324 2.70324 2.70324 ZT20-23 3.4646749999999997 3.4646749999999997 3.4646749999999997