condition mean min max ZT0-3 31.86006 31.86006 31.86006 ZT4-7 35.614352 35.614352 35.614352 ZT8-11 49.7435015 49.7435015 49.7435015 ZT12-15 36.7624 36.7624 36.7624 ZT16-19 34.6531645 34.6531645 34.6531645 ZT20-23 35.0964365 35.0964365 35.0964365