condition mean min max ZT0-3 100.79938333333334 49.44065 128.406 ZT4-7 43.77375 43.77375 43.77375 ZT8-11 37.543949999999995 37.543949999999995 37.543949999999995 ZT12-15 50.756025 46.3792 55.132850000000005 ZT16-19 58.985150000000004 58.985150000000004 58.985150000000004 ZT20-23 96.49645000000001 96.49645000000001 96.49645000000001