condition mean min max ZT0-3 836.3 836.3 836.3 ZT4-7 1044.0 1044.0 1044.0 ZT8-11 1084.9 1084.9 1084.9 ZT12-15 987.45 987.45 987.45 ZT16-19 1043.2 1043.2 1043.2 ZT20-23 1016.65 1016.65 1016.65