condition mean min max ZT0-3 0.9905900812500001 0.7579864070000001 1.2231937555 ZT4-7 1.22351265125 0.9076947995 1.539330503 ZT8-11 8.295012240750001 2.820406641 13.7696178405 ZT12-15 23.0056571425 21.996206215 24.01510807 ZT16-19 16.48493976325 13.7931056815 19.176773845 ZT20-23 6.8845980085 5.125931565 8.643264452