condition mean min max ZT0-3 358.6 358.6 358.6 ZT4-7 434.8 434.8 434.8 ZT8-11 468.05 468.05 468.05 ZT12-15 476.5 476.5 476.5 ZT16-19 541.15 541.15 541.15 ZT20-23 425.6 425.6 425.6