condition mean min max ZT0-3 13.165549549000001 9.86275 16.468349098 ZT4-7 12.1631 12.1631 12.1631 ZT8-11 2.34245 2.34245 2.34245 ZT12-15 3.764321380568167 2.2004425 5.328200261136334 ZT16-19 2.124422375 0.54194475 3.7068999999999996 ZT20-23 0 0 0