condition mean min max ZT0-3 71.6 71.6 71.6 ZT4-7 119.9 119.9 119.9 ZT8-11 119.55000000000001 119.55000000000001 119.55000000000001 ZT12-15 97.30000000000001 97.30000000000001 97.30000000000001 ZT16-19 91.5 91.5 91.5 ZT20-23 57.599999999999994 57.599999999999994 57.599999999999994