condition mean min max ZT0-3 23.805533333333333 10.67255 31.6924 ZT4-7 9.933535 9.933535 9.933535 ZT8-11 13.0826 13.0826 13.0826 ZT12-15 22.29975 21.801 22.7985 ZT16-19 24.12385 24.12385 24.12385 ZT20-23 35.2338 35.2338 35.2338