condition mean min max ZT0-3 33.54175 11.01845 45.48950000000001 ZT4-7 13.6904 13.6904 13.6904 ZT8-11 30.64515 30.64515 30.64515 ZT12-15 15.873125 15.18955 16.5567 ZT16-19 24.394350000000003 24.394350000000003 24.394350000000003 ZT20-23 44.70315 44.70315 44.70315