condition mean min max ZT0-3 33.7228 27.273899999999998 36.96455 ZT4-7 16.45995 16.45995 16.45995 ZT8-11 8.830315 8.830315 8.830315 ZT12-15 8.620735 5.942970000000001 11.2985 ZT16-19 7.15639 7.15639 7.15639 ZT20-23 15.07705 15.07705 15.07705