condition mean min max ZT0-3 13.265049999999999 13.265049999999999 13.265049999999999 ZT4-7 13.05105 13.05105 13.05105 ZT8-11 12.511399999999998 12.511399999999998 12.511399999999998 ZT12-15 12.1039 12.1039 12.1039 ZT16-19 15.71245 15.71245 15.71245 ZT20-23 13.029499999999999 13.029499999999999 13.029499999999999