condition mean min max ZT0-3 130.25 130.25 130.25 ZT4-7 172.8 172.8 172.8 ZT8-11 88.05 88.05 88.05 ZT12-15 115.35000000000001 115.35000000000001 115.35000000000001 ZT16-19 102.75 102.75 102.75 ZT20-23 93.05 93.05 93.05