condition mean min max ZT0-3 1878.2 1878.2 1878.2 ZT4-7 1206.0 1206.0 1206.0 ZT8-11 1252.25 1252.25 1252.25 ZT12-15 1087.55 1087.55 1087.55 ZT16-19 1398.85 1398.85 1398.85 ZT20-23 1864.85 1864.85 1864.85