condition mean min max ZT0-3 10.9942043975 10.04401915 11.944389645000001 ZT4-7 12.28977086225 9.946235464499999 14.633306260000001 ZT8-11 13.246532372499999 13.218423905 13.27464084 ZT12-15 5.1473346595 2.129932234 8.164737085 ZT16-19 0.71395825525 0.626434562 0.8014819485 ZT20-23 0.32337285325 0.1602583595 0.486487347