condition mean min max ZT0-3 158.990725315 143.68247623 174.2989744 ZT4-7 47.7051430425 36.05822576 59.352060325000004 ZT8-11 32.62027109 24.188440210000003 41.052101969999995 ZT12-15 66.4947035125 60.570003485 72.41940353999999 ZT16-19 93.975909465 89.991105705 97.960713225 ZT20-23 102.45779955 101.23975010000001 103.675849