condition mean min max ZT0-3 41.599999999999994 41.599999999999994 41.599999999999994 ZT4-7 34.1 34.1 34.1 ZT8-11 56.150000000000006 56.150000000000006 56.150000000000006 ZT12-15 108.65 108.65 108.65 ZT16-19 109.9 109.9 109.9 ZT20-23 70.1 70.1 70.1