condition mean min max ZT0-3 14.850900000000001 14.427800000000001 15.274000000000001 ZT4-7 24.66525 24.66525 24.66525 ZT8-11 28.516 28.516 28.516 ZT12-15 0 0 0 ZT16-19 18.4157 18.4157 18.4157 ZT20-23 16.286250000000003 16.286250000000003 16.286250000000003