condition mean min max ZT0-3 212.48175 201.8675 223.096 ZT4-7 144.185 144.185 144.185 ZT8-11 158.2305 158.2305 158.2305 ZT12-15 0 0 0 ZT16-19 240.84550000000002 240.84550000000002 240.84550000000002 ZT20-23 218.0795 218.0795 218.0795