condition mean min max ZT0-3 0.4167805 0.118852 0.714709 ZT4-7 0.4850575 0.4850575 0.4850575 ZT8-11 0.697264 0.697264 0.697264 ZT12-15 0 0 0 ZT16-19 1.0547345 1.0547345 1.0547345 ZT20-23 0.707223 0.707223 0.707223