condition mean min max ZT0-3 522.398 522.398 522.398 ZT4-7 680.167 680.167 680.167 ZT8-11 1371.0 1371.0 1371.0 ZT12-15 1353.69 1353.69 1353.69 ZT16-19 902.787 902.787 902.787 ZT20-23 496.38250000000005 496.38250000000005 496.38250000000005