condition mean min max ZT0-3 1.98408 1.490825 2.68087 ZT4-7 1.7913450000000002 1.7913450000000002 1.7913450000000002 ZT8-11 0.422377 0.422377 0.422377 ZT12-15 0.7214795 0.635888 0.807071 ZT16-19 0.577226 0.577226 0.577226 ZT20-23 1.0976095 1.0976095 1.0976095