condition mean min max ZT0-3 0.39379118874999997 0.08875588449999999 0.698826493 ZT4-7 0.42048434625 0.41937935049999997 0.421589342 ZT8-11 0.2195461695 0.048149817000000004 0.390942522 ZT12-15 0.365720531 0.350505928 0.38093513399999995 ZT16-19 0.9816416895 0.9137511085000001 1.0495322704999999 ZT20-23 0.885836892 0.6621735035 1.1095002805