condition mean min max ZT0-3 5.578192333333333 0.1688645 16.2667 ZT4-7 14.34845 14.34845 14.34845 ZT8-11 67.1181 67.1181 67.1181 ZT12-15 24.024214999999998 7.85238 40.19605 ZT16-19 1.0092465 1.0092465 1.0092465 ZT20-23 0.282678 0.282678 0.282678