condition mean min max ZT0-3 49.80182666666666 49.80182666666666 49.80182666666666 ZT4-7 57.20488 57.20488 57.20488 ZT8-11 42.20869999999999 42.20869999999999 42.20869999999999 ZT12-15 37.83179 37.83179 37.83179 ZT16-19 85.61445 85.61445 85.61445 ZT20-23 86.97642 86.97642 86.97642