condition mean min max ZT0-3 11.140073333333333 10.97902 11.317350000000001 ZT4-7 24.5367 24.5367 24.5367 ZT8-11 99.25219999999999 99.25219999999999 99.25219999999999 ZT12-15 73.217275 55.96295 90.4716 ZT16-19 31.18195 31.18195 31.18195 ZT20-23 23.24005 23.24005 23.24005