condition mean min max ZT0-3 56.9136 56.19605 57.631150000000005 ZT4-7 48.72465 48.72465 48.72465 ZT8-11 56.32385 56.32385 56.32385 ZT12-15 0 0 0 ZT16-19 63.4153 63.4153 63.4153 ZT20-23 67.22030000000001 67.22030000000001 67.22030000000001