condition mean min max ZT0-3 100.06225 88.4305 111.694 ZT4-7 85.8478 85.8478 85.8478 ZT8-11 30.55615 30.55615 30.55615 ZT12-15 0 0 0 ZT16-19 82.76304999999999 82.76304999999999 82.76304999999999 ZT20-23 122.46700000000001 122.46700000000001 122.46700000000001