condition mean min max ZT0-3 26.165775000000004 23.966250000000002 28.3653 ZT4-7 19.4414 19.4414 19.4414 ZT8-11 19.9375 19.9375 19.9375 ZT12-15 0 0 0 ZT16-19 25.881349999999998 25.881349999999998 25.881349999999998 ZT20-23 19.746499999999997 19.746499999999997 19.746499999999997