condition mean min max ZT0-3 16.809919999999998 13.515640000000001 20.1042 ZT4-7 7.5580750000000005 7.5580750000000005 7.5580750000000005 ZT8-11 23.81285 23.81285 23.81285 ZT12-15 0 0 0 ZT16-19 13.12325 13.12325 13.12325 ZT20-23 14.6266 14.6266 14.6266