condition mean min max ZT0-3 368.79999999999995 368.79999999999995 368.79999999999995 ZT4-7 321.6 321.6 321.6 ZT8-11 298.95 298.95 298.95 ZT12-15 377.45 377.45 377.45 ZT16-19 369.55 369.55 369.55 ZT20-23 401.4 401.4 401.4