condition mean min max ZT0-3 196.05 196.05 196.05 ZT4-7 194.8 194.8 194.8 ZT8-11 187.10000000000002 187.10000000000002 187.10000000000002 ZT12-15 184.2 184.2 184.2 ZT16-19 239.4 239.4 239.4 ZT20-23 240.15 240.15 240.15