condition mean min max ZT0-3 6.144400672250001 4.987158257 7.3016430875000005 ZT4-7 4.78172159925 4.550908762 5.0125344365 ZT8-11 11.21597732275 5.1004544595 17.331500186 ZT12-15 29.138180117500003 24.206910585000003 34.06944965 ZT16-19 24.737772680000003 23.17375588 26.301789480000004 ZT20-23 12.848556683249999 9.7486516115 15.948461755