condition mean min max ZT0-3 231.4425 231.4425 231.4425 ZT4-7 191.82600000000002 191.82600000000002 191.82600000000002 ZT8-11 185.0505 185.0505 185.0505 ZT12-15 169.2715 169.2715 169.2715 ZT16-19 248.2025 248.2025 248.2025 ZT20-23 271.85 271.85 271.85