condition mean min max ZT0-3 5.197024265 3.009651912 7.384396618 ZT4-7 12.327193359999999 10.510386194999999 14.144000525 ZT8-11 13.1874924875 12.303716925 14.07126805 ZT12-15 9.1667933935 7.8878197275 10.4457670595 ZT16-19 12.180083046750001 11.602094498500001 12.758071595 ZT20-23 16.45580973 15.26966647 17.64195299