condition mean min max ZT0-3 11.570632499999999 11.49265 11.648615 ZT4-7 15.4869 15.4869 15.4869 ZT8-11 17.5435 17.5435 17.5435 ZT12-15 0 0 0 ZT16-19 22.9214 22.9214 22.9214 ZT20-23 38.308749999999996 38.308749999999996 38.308749999999996