condition mean min max ZT0-3 51.795707 51.795707 51.795707 ZT4-7 92.662969 92.662969 92.662969 ZT8-11 151.19519250000002 151.19519250000002 151.19519250000002 ZT12-15 95.738867 95.738867 95.738867 ZT16-19 65.270658 65.270658 65.270658 ZT20-23 19.9153355 19.9153355 19.9153355