condition mean min max ZT0-3 407.7 407.7 407.7 ZT4-7 598.4 598.4 598.4 ZT8-11 590.8 590.8 590.8 ZT12-15 937.7 937.7 937.7 ZT16-19 841.4 841.4 841.4 ZT20-23 425.6 425.6 425.6