condition mean min max ZT0-3 117.80000000000001 117.80000000000001 117.80000000000001 ZT4-7 5.5 5.5 5.5 ZT8-11 75.65 75.65 75.65 ZT12-15 140.75 140.75 140.75 ZT16-19 205.05 205.05 205.05 ZT20-23 195.7 195.7 195.7