condition mean min max ZT0-3 3.9780469709999995 2.434019459 5.522074482999999 ZT4-7 13.415628875 11.591055919999999 15.24020183 ZT8-11 7.418422286 5.8669928275 8.9698517445 ZT12-15 1.0966883455 0.22977110450000002 1.9636055865 ZT16-19 0.10068042475 0.080670628 0.1206902215 ZT20-23 0.263118346 0.1730347265 0.3532019655