condition mean min max ZT0-3 0.04310333325 0.0237842565 0.06242241 ZT4-7 0.022530214 0.0173819755 0.0276784525 ZT8-11 0.02684302375 0.012902892 0.0407831555 ZT12-15 0.98520909575 0.410328977 1.5600892145 ZT16-19 1.3537359540000002 1.1514111745000002 1.5560607335 ZT20-23 1.8542427695 1.262531596 2.445953943