condition mean min max ZT0-3 17.407351 17.407351 17.407351 ZT4-7 13.296569000000002 13.296569000000002 13.296569000000002 ZT8-11 11.242374 11.242374 11.242374 ZT12-15 14.071911 14.071911 14.071911 ZT16-19 12.787965 12.787965 12.787965 ZT20-23 11.3970475 11.3970475 11.3970475