condition mean min max ZT0-3 13.85568 10.579360000000001 17.131999999999998 ZT4-7 11.9484 11.9484 11.9484 ZT8-11 10.95285 10.95285 10.95285 ZT12-15 0 0 0 ZT16-19 13.7603 13.7603 13.7603 ZT20-23 10.118749999999999 10.118749999999999 10.118749999999999