condition mean min max ZT0-3 5.25 5.25 5.25 ZT4-7 2.3 2.3 2.3 ZT8-11 4.3 4.3 4.3 ZT12-15 5.35 5.35 5.35 ZT16-19 4.35 4.35 4.35 ZT20-23 11.049999999999999 11.049999999999999 11.049999999999999