condition mean min max ZT0-3 0.40865507875000007 0.37824272200000003 0.43906743550000005 ZT4-7 0.17962384225 0.086710844 0.2725368405 ZT8-11 23.329036723999998 11.253154658 35.404918789999996 ZT12-15 31.6222421775 23.748922665 39.49556169 ZT16-19 12.73151765025 9.6788123055 15.784222995 ZT20-23 2.6129558375 1.4832856189999999 3.7426260559999998