condition mean min max ZT0-3 9.310025 9.310025 9.310025 ZT4-7 9.0763385 9.0763385 9.0763385 ZT8-11 9.1775995 9.1775995 9.1775995 ZT12-15 10.8473105 10.8473105 10.8473105 ZT16-19 10.433883 10.433883 10.433883 ZT20-23 11.8399795 11.8399795 11.8399795