condition mean min max ZT0-3 41.7716906075 29.407955815 54.135425399999995 ZT4-7 13.830121459999999 12.886256029999998 14.77398689 ZT8-11 15.1269712475 12.04844855 18.205493945 ZT12-15 13.12911006725 11.4601230135 14.798097121000001 ZT16-19 12.953582082499999 10.12575101 15.781413155 ZT20-23 21.2425410875 18.364640075 24.120442099999998