condition mean min max ZT0-3 975.7 975.7 975.7 ZT4-7 1009.8 1009.8 1009.8 ZT8-11 834.2 834.2 834.2 ZT12-15 1066.85 1066.85 1066.85 ZT16-19 1018.2 1018.2 1018.2 ZT20-23 950.7 950.7 950.7