condition mean min max ZT0-3 195.87366666666665 188.2605 200.21499999999997 ZT4-7 164.7545 164.7545 164.7545 ZT8-11 77.7453 77.7453 77.7453 ZT12-15 63.7994 54.47345 73.12535 ZT16-19 99.02869999999999 99.02869999999999 99.02869999999999 ZT20-23 191.2305 191.2305 191.2305