condition mean min max ZT0-3 0.8887535 0.797843 0.979664 ZT4-7 1.6822300000000001 1.6822300000000001 1.6822300000000001 ZT8-11 4.507820000000001 4.507820000000001 4.507820000000001 ZT12-15 0 0 0 ZT16-19 2.3670150000000003 2.3670150000000003 2.3670150000000003 ZT20-23 1.38357 1.38357 1.38357