condition mean min max ZT0-3 66.65983333333334 44.8557 80.91810000000001 ZT4-7 34.2943 34.2943 34.2943 ZT8-11 15.204600000000001 15.204600000000001 15.204600000000001 ZT12-15 17.650275 15.3096 19.99095 ZT16-19 25.4443 25.4443 25.4443 ZT20-23 55.1593 55.1593 55.1593