condition mean min max ZT0-3 0.5387936666666666 0.517965 0.567279 ZT4-7 0.1637185 0.1637185 0.1637185 ZT8-11 0.24242460000000002 0.24242460000000002 0.24242460000000002 ZT12-15 0.45410325 0.2829165 0.62529 ZT16-19 0.161467 0.161467 0.161467 ZT20-23 0.38975150000000003 0.38975150000000003 0.38975150000000003