condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0379804365 0.0 0.075960873 ZT16-19 0.13150147875 0.0595632595 0.203439698 ZT20-23 0.0 0.0 0.0