condition mean min max ZT0-3 42.182582925 30.65235573 53.71281012 ZT4-7 131.95698105000002 125.70710410000001 138.206858 ZT8-11 425.79199362500003 203.85863405000003 647.7253532000001 ZT12-15 1035.791717775 910.57575265 1161.0076829 ZT16-19 565.14970965 498.5805851 631.7188342 ZT20-23 281.44632475 220.21008465 342.68256484999995