condition mean min max ZT0-3 41.9735 40.13245 43.76665 ZT4-7 19.5684 19.5684 19.5684 ZT8-11 24.5455 24.5455 24.5455 ZT12-15 23.917025000000002 22.12595 25.7081 ZT16-19 23.71775 23.71775 23.71775 ZT20-23 37.29595 37.29595 37.29595