condition mean min max ZT0-3 1.10681 1.10681 1.10681 ZT4-7 0.8698349999999999 0.8698349999999999 0.8698349999999999 ZT8-11 0.5900489999999999 0.5900489999999999 0.5900489999999999 ZT12-15 0.520786 0.520786 0.520786 ZT16-19 0.5706435 0.5706435 0.5706435 ZT20-23 1.222575 1.222575 1.222575