condition mean min max ZT0-3 0.12783805 0.11111560000000001 0.1445605 ZT4-7 0.0741694 0.0741694 0.0741694 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0363334 0.0363334 0.0363334 ZT20-23 0.0734845 0.0734845 0.0734845