condition mean min max ZT0-3 9.095115 9.095115 9.095115 ZT4-7 6.5322700000000005 6.5322700000000005 6.5322700000000005 ZT8-11 3.149295 3.149295 3.149295 ZT12-15 3.96188 3.96188 3.96188 ZT16-19 11.21041 11.21041 11.21041 ZT20-23 10.7318 10.7318 10.7318