condition mean min max ZT0-3 40.975875 34.689949999999996 47.2618 ZT4-7 48.9489 48.9489 48.9489 ZT8-11 56.84305 56.84305 56.84305 ZT12-15 0 0 0 ZT16-19 82.54390000000001 82.54390000000001 82.54390000000001 ZT20-23 54.736549999999994 54.736549999999994 54.736549999999994