condition mean min max ZT0-3 0.03187730625 0.0 0.0637546125 ZT4-7 0.80403009 0.429927331 1.178132849 ZT8-11 1.9079985615 1.654194457 2.161802666 ZT12-15 1.8440108295000002 1.7332456745 1.9547759845000001 ZT16-19 1.13522367525 1.083176186 1.1872711645 ZT20-23 1.074254673 0.800097356 1.3484119899999998