condition mean min max ZT0-3 320.54999999999995 320.54999999999995 320.54999999999995 ZT4-7 388.7 388.7 388.7 ZT8-11 353.4 353.4 353.4 ZT12-15 377.35 377.35 377.35 ZT16-19 315.95 315.95 315.95 ZT20-23 323.25 323.25 323.25