condition mean min max ZT0-3 106.64863333333334 101.2679 109.44200000000001 ZT4-7 92.07300000000001 92.07300000000001 92.07300000000001 ZT8-11 78.53265 78.53265 78.53265 ZT12-15 58.10825 53.6708 62.545700000000004 ZT16-19 32.1134 32.1134 32.1134 ZT20-23 41.9352 41.9352 41.9352