condition mean min max ZT0-3 15.652999999999999 15.652999999999999 15.652999999999999 ZT4-7 11.3274 11.3274 11.3274 ZT8-11 12.4768 12.4768 12.4768 ZT12-15 14.31795 14.31795 14.31795 ZT16-19 16.78115 16.78115 16.78115 ZT20-23 16.59025 16.59025 16.59025