condition mean min max ZT0-3 37.90486666666667 31.534950000000002 44.0837 ZT4-7 32.11065 32.11065 32.11065 ZT8-11 28.95205 28.95205 28.95205 ZT12-15 40.508925000000005 40.263 40.754850000000005 ZT16-19 39.57015 39.57015 39.57015 ZT20-23 51.7503 51.7503 51.7503