condition mean min max ZT0-3 42.765475 34.1816 51.34935 ZT4-7 17.05705 17.05705 17.05705 ZT8-11 15.205850000000002 15.205850000000002 15.205850000000002 ZT12-15 0 0 0 ZT16-19 17.09555 17.09555 17.09555 ZT20-23 38.3872 38.3872 38.3872