condition mean min max ZT0-3 25.862949999999998 25.862949999999998 25.862949999999998 ZT4-7 22.7579 22.7579 22.7579 ZT8-11 24.0487 24.0487 24.0487 ZT12-15 20.188850000000002 20.188850000000002 20.188850000000002 ZT16-19 32.1813 32.1813 32.1813 ZT20-23 27.05685 27.05685 27.05685