condition mean min max ZT0-3 35.56243666666667 4.2412600000000005 51.3256 ZT4-7 1.0446404999999999 1.0446404999999999 1.0446404999999999 ZT8-11 1.14569 1.14569 1.14569 ZT12-15 1.8484800000000001 1.70473 1.9922300000000002 ZT16-19 1.089435 1.089435 1.089435 ZT20-23 2.5964799999999997 2.5964799999999997 2.5964799999999997