condition mean min max ZT0-3 0.43287716666666665 0.27133 0.6331235 ZT4-7 0.3792345 0.3792345 0.3792345 ZT8-11 0.9249155 0.9249155 0.9249155 ZT12-15 0.68088675 0.6300145 0.731759 ZT16-19 0.6972615 0.6972615 0.6972615 ZT20-23 0.4908355 0.4908355 0.4908355