condition mean min max ZT0-3 21.16485 21.16485 21.16485 ZT4-7 22.46695 22.46695 22.46695 ZT8-11 11.235790000000001 11.235790000000001 11.235790000000001 ZT12-15 10.87875 10.87875 10.87875 ZT16-19 13.4399 13.4399 13.4399 ZT20-23 10.956305 10.956305 10.956305