condition mean min max ZT0-3 28.299999999999997 28.299999999999997 28.299999999999997 ZT4-7 75.1 75.1 75.1 ZT8-11 32.2 32.2 32.2 ZT12-15 69.55000000000001 69.55000000000001 69.55000000000001 ZT16-19 49.3 49.3 49.3 ZT20-23 54.6 54.6 54.6