condition mean min max ZT0-3 0.068601 0.0 0.105498 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0970435 0.0970435 0.0970435 ZT12-15 0.0483705 0.0 0.096741 ZT16-19 0.368092 0.368092 0.368092 ZT20-23 0.0 0.0 0.0