condition mean min max ZT0-3 50.58385 50.58385 50.58385 ZT4-7 43.028549999999996 43.028549999999996 43.028549999999996 ZT8-11 37.19445 37.19445 37.19445 ZT12-15 38.7693 38.7693 38.7693 ZT16-19 48.25395 48.25395 48.25395 ZT20-23 46.883849999999995 46.883849999999995 46.883849999999995