condition mean min max ZT0-3 818.74884 818.74884 818.74884 ZT4-7 2405.189037 2405.189037 2405.189037 ZT8-11 2514.4578965 2514.4578965 2514.4578965 ZT12-15 2058.4325975 2058.4325975 2058.4325975 ZT16-19 1090.8833184999999 1090.8833184999999 1090.8833184999999 ZT20-23 922.212366 922.212366 922.212366