condition mean min max ZT0-3 0.12983163333333334 0.0461489 0.19454400000000002 ZT4-7 0.1702285 0.1702285 0.1702285 ZT8-11 0.2928755 0.2928755 0.2928755 ZT12-15 0.4516515 0.321189 0.582114 ZT16-19 0.6144525 0.6144525 0.6144525 ZT20-23 0.48642450000000004 0.48642450000000004 0.48642450000000004