condition mean min max ZT0-3 0.4511283333333333 0.0 0.69877 ZT4-7 0.641675 0.641675 0.641675 ZT8-11 0.3215545 0.3215545 0.3215545 ZT12-15 0.966575 0.732735 1.200415 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0