condition mean min max ZT0-3 10.5 10.5 10.5 ZT4-7 10.3 10.3 10.3 ZT8-11 4.05 4.05 4.05 ZT12-15 9.3 9.3 9.3 ZT16-19 4.15 4.15 4.15 ZT20-23 11.149999999999999 11.149999999999999 11.149999999999999