condition mean min max ZT0-3 0.20356849999999999 0.0762295 0.33090749999999997 ZT4-7 0.203208 0.203208 0.203208 ZT8-11 0.6365965 0.6365965 0.6365965 ZT12-15 0 0 0 ZT16-19 0.40041950000000004 0.40041950000000004 0.40041950000000004 ZT20-23 0.0252703 0.0252703 0.0252703