condition mean min max ZT0-3 16.15 16.15 16.15 ZT4-7 13.3 13.3 13.3 ZT8-11 30.299999999999997 30.299999999999997 30.299999999999997 ZT12-15 53.65 53.65 53.65 ZT16-19 15.2 15.2 15.2 ZT20-23 11.049999999999999 11.049999999999999 11.049999999999999