condition mean min max ZT0-3 451.6 451.6 451.6 ZT4-7 528.2 528.2 528.2 ZT8-11 454.25 454.25 454.25 ZT12-15 478.4 478.4 478.4 ZT16-19 521.5 521.5 521.5 ZT20-23 407.8 407.8 407.8