condition mean min max ZT0-3 972.1 972.1 972.1 ZT4-7 764.0 764.0 764.0 ZT8-11 746.45 746.45 746.45 ZT12-15 808.9000000000001 808.9000000000001 808.9000000000001 ZT16-19 925.5 925.5 925.5 ZT20-23 1081.35 1081.35 1081.35