condition mean min max ZT0-3 1113.9 1113.9 1113.9 ZT4-7 958.4 958.4 958.4 ZT8-11 914.6 914.6 914.6 ZT12-15 924.9000000000001 924.9000000000001 924.9000000000001 ZT16-19 1057.75 1057.75 1057.75 ZT20-23 1121.35 1121.35 1121.35