condition mean min max ZT0-3 3059.65 3059.65 3059.65 ZT4-7 3666.2 3666.2 3666.2 ZT8-11 3987.0 3987.0 3987.0 ZT12-15 3368.25 3368.25 3368.25 ZT16-19 2226.35 2226.35 2226.35 ZT20-23 2443.7 2443.7 2443.7