condition mean min max ZT0-3 14.839949999999998 12.87835 16.80155 ZT4-7 7.9775100000000005 7.9775100000000005 7.9775100000000005 ZT8-11 1.7357 1.7357 1.7357 ZT12-15 0 0 0 ZT16-19 6.297235 6.297235 6.297235 ZT20-23 13.5803 13.5803 13.5803