condition mean min max ZT0-3 52.81777778 52.81777778 52.81777778 ZT4-7 237.5638889 237.5638889 237.5638889 ZT8-11 276.46388890000003 276.46388890000003 276.46388890000003 ZT12-15 117.39111112333333 117.39111112333333 117.39111112333333 ZT16-19 66.34111111333334 66.34111111333334 66.34111111333334 ZT20-23 48.04 48.04 48.04