condition mean min max ZT0-3 1.5547 1.5547 1.5547 ZT4-7 0.9427435000000001 0.9427435000000001 0.9427435000000001 ZT8-11 1.011637 1.011637 1.011637 ZT12-15 1.74547 1.74547 1.74547 ZT16-19 2.111945 2.111945 2.111945 ZT20-23 1.6124749999999999 1.6124749999999999 1.6124749999999999