condition mean min max ZT0-3 232.95 232.95 232.95 ZT4-7 180.4 180.4 180.4 ZT8-11 165.05 165.05 165.05 ZT12-15 200.6 200.6 200.6 ZT16-19 191.60000000000002 191.60000000000002 191.60000000000002 ZT20-23 185.5 185.5 185.5