condition mean min max ZT0-3 0.53632995 0.0355767 1.504205 ZT4-7 5.28967 5.28967 5.28967 ZT8-11 0.2405465 0.2405465 0.2405465 ZT12-15 0.175163925 0.13846585 0.211862 ZT16-19 0.09731139999999999 0.09731139999999999 0.09731139999999999 ZT20-23 0.0 0.0 0.0