condition mean min max ZT0-3 47.496704 47.496704 47.496704 ZT4-7 167.4075215 167.4075215 167.4075215 ZT8-11 240.6024615 240.6024615 240.6024615 ZT12-15 219.1836345 219.1836345 219.1836345 ZT16-19 136.0355495 136.0355495 136.0355495 ZT20-23 76.3228295 76.3228295 76.3228295