condition mean min max ZT0-3 8.87421 8.602235 9.146185 ZT4-7 9.849675000000001 9.849675000000001 9.849675000000001 ZT8-11 9.12777 9.12777 9.12777 ZT12-15 0 0 0 ZT16-19 8.555 8.555 8.555 ZT20-23 10.58066 10.58066 10.58066