condition mean min max ZT0-3 0.2920453 0.1110496 0.473041 ZT4-7 0.4097615 0.4097615 0.4097615 ZT8-11 1.663945 1.663945 1.663945 ZT12-15 0 0 0 ZT16-19 1.310445 1.310445 1.310445 ZT20-23 0.731158 0.731158 0.731158