condition mean min max ZT0-3 26.307450000000003 26.307450000000003 26.307450000000003 ZT4-7 24.80845 24.80845 24.80845 ZT8-11 18.53255 18.53255 18.53255 ZT12-15 20.785400000000003 20.785400000000003 20.785400000000003 ZT16-19 21.5986 21.5986 21.5986 ZT20-23 27.903100000000002 27.903100000000002 27.903100000000002