condition mean min max ZT0-3 33.2957 33.2957 33.2957 ZT4-7 38.054050000000004 38.054050000000004 38.054050000000004 ZT8-11 13.6198 13.6198 13.6198 ZT12-15 15.6065 15.6065 15.6065 ZT16-19 15.54835 15.54835 15.54835 ZT20-23 31.92525 31.92525 31.92525