condition mean min max ZT0-3 94.539837 94.539837 94.539837 ZT4-7 86.43936 86.43936 86.43936 ZT8-11 89.5490885 89.5490885 89.5490885 ZT12-15 110.4707 110.4707 110.4707 ZT16-19 94.903915 94.903915 94.903915 ZT20-23 94.5295865 94.5295865 94.5295865