condition mean min max ZT0-3 0.0217409 0.0 0.0434818 ZT4-7 0.0442258 0.0442258 0.0442258 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0