condition mean min max ZT0-3 8.3802025 7.90118 8.859225 ZT4-7 10.59676 10.59676 10.59676 ZT8-11 13.79245 13.79245 13.79245 ZT12-15 0 0 0 ZT16-19 14.55535 14.55535 14.55535 ZT20-23 12.538450000000001 12.538450000000001 12.538450000000001