condition mean min max ZT0-3 0.10471216666666666 0.0 0.251063 ZT4-7 0.0 0.0 0.0 ZT8-11 0.061022 0.061022 0.061022 ZT12-15 0.0 0.0 0.0 ZT16-19 0.1178785 0.1178785 0.1178785 ZT20-23 0.322827 0.322827 0.322827