condition mean min max ZT0-3 25.846409 25.846409 25.846409 ZT4-7 41.4019845 41.4019845 41.4019845 ZT8-11 32.1180855 32.1180855 32.1180855 ZT12-15 37.473743999999996 37.473743999999996 37.473743999999996 ZT16-19 30.730354000000002 30.730354000000002 30.730354000000002 ZT20-23 34.830347 34.830347 34.830347