condition mean min max ZT0-3 381.2505 381.2505 381.2505 ZT4-7 474.6345 474.6345 474.6345 ZT8-11 440.7595 440.7595 440.7595 ZT12-15 344.1875 344.1875 344.1875 ZT16-19 296.12850000000003 296.12850000000003 296.12850000000003 ZT20-23 335.047 335.047 335.047