condition mean min max ZT0-3 67.95381666666665 53.17965 78.95554999999999 ZT4-7 63.78655 63.78655 63.78655 ZT8-11 117.81899999999999 117.81899999999999 117.81899999999999 ZT12-15 155.0145 145.3305 164.6985 ZT16-19 119.73599999999999 119.73599999999999 119.73599999999999 ZT20-23 99.6605 99.6605 99.6605