condition mean min max ZT0-3 5.03177059375 0.9047964059999999 9.158744781500001 ZT4-7 39.437090285 23.7963565 55.07782407 ZT8-11 70.3813607775 62.58452312 78.17819843500001 ZT12-15 46.8234279775 33.39044766 60.256408295 ZT16-19 10.22136517275 8.795640639999998 11.647089705500001 ZT20-23 6.0301577535 6.0267064865 6.0336090205