condition mean min max ZT0-3 20.9603 20.9603 20.9603 ZT4-7 13.427150000000001 13.427150000000001 13.427150000000001 ZT8-11 10.249 10.249 10.249 ZT12-15 11.53135 11.53135 11.53135 ZT16-19 20.3658 20.3658 20.3658 ZT20-23 22.290349999999997 22.290349999999997 22.290349999999997