condition mean min max ZT0-3 11.422625 11.1911 11.654150000000001 ZT4-7 11.725000000000001 11.725000000000001 11.725000000000001 ZT8-11 13.56265 13.56265 13.56265 ZT12-15 0 0 0 ZT16-19 13.27965 13.27965 13.27965 ZT20-23 12.9331 12.9331 12.9331