condition mean min max ZT0-3 1714.9 1714.9 1714.9 ZT4-7 966.7 966.7 966.7 ZT8-11 1123.6999999999998 1123.6999999999998 1123.6999999999998 ZT12-15 1439.2 1439.2 1439.2 ZT16-19 2147.35 2147.35 2147.35 ZT20-23 1974.9 1974.9 1974.9