condition mean min max ZT0-3 7.45259 7.45259 7.45259 ZT4-7 10.72672 10.72672 10.72672 ZT8-11 10.420490000000001 10.420490000000001 10.420490000000001 ZT12-15 10.4938 10.4938 10.4938 ZT16-19 8.46742 8.46742 8.46742 ZT20-23 8.210903333333334 8.210903333333334 8.210903333333334