condition mean min max ZT0-3 1969.45 1969.45 1969.45 ZT4-7 2314.6 2314.6 2314.6 ZT8-11 2586.8 2586.8 2586.8 ZT12-15 2314.95 2314.95 2314.95 ZT16-19 2401.7 2401.7 2401.7 ZT20-23 2096.5 2096.5 2096.5