condition mean min max ZT0-3 1342.674081 1342.674081 1342.674081 ZT4-7 1325.3792555 1325.3792555 1325.3792555 ZT8-11 1222.638902 1222.638902 1222.638902 ZT12-15 1244.097844 1244.097844 1244.097844 ZT16-19 1600.6610074999999 1600.6610074999999 1600.6610074999999 ZT20-23 1937.801353 1937.801353 1937.801353