condition mean min max ZT0-3 26.6616 26.6616 26.6616 ZT4-7 19.423450000000003 19.423450000000003 19.423450000000003 ZT8-11 29.312 29.312 29.312 ZT12-15 28.187350000000002 28.187350000000002 28.187350000000002 ZT16-19 31.622500000000002 31.622500000000002 31.622500000000002 ZT20-23 25.4104 25.4104 25.4104