condition mean min max ZT0-3 22.31025 22.31025 22.31025 ZT4-7 19.304299999999998 19.304299999999998 19.304299999999998 ZT8-11 17.9078 17.9078 17.9078 ZT12-15 19.6757 19.6757 19.6757 ZT16-19 19.82295 19.82295 19.82295 ZT20-23 21.4159 21.4159 21.4159