condition mean min max ZT0-3 793.4 793.4 793.4 ZT4-7 1023.6 1023.6 1023.6 ZT8-11 1001.85 1001.85 1001.85 ZT12-15 1198.45 1198.45 1198.45 ZT16-19 1148.0 1148.0 1148.0 ZT20-23 925.55 925.55 925.55