condition mean min max ZT0-3 133.5645 133.5645 133.5645 ZT4-7 109.83 109.83 109.83 ZT8-11 91.9033 91.9033 91.9033 ZT12-15 124.64 124.64 124.64 ZT16-19 179.73000000000002 179.73000000000002 179.73000000000002 ZT20-23 153.542 153.542 153.542