condition mean min max ZT0-3 0.0330946 0.0330946 0.0330946 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0159555 0.0159555 0.0159555 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0