condition mean min max ZT0-3 5.65 5.65 5.65 ZT4-7 3.0 3.0 3.0 ZT8-11 9.2 9.2 9.2 ZT12-15 6.65 6.65 6.65 ZT16-19 3.55 3.55 3.55 ZT20-23 10.149999999999999 10.149999999999999 10.149999999999999