condition mean min max ZT0-3 0.19293712475000002 0.13446855 0.2514056995 ZT4-7 0.19364335075 0.187721572 0.1995651295 ZT8-11 0.35225598925 0.2310646 0.4734473785 ZT12-15 0.42855249575 0.35458083949999997 0.502524152 ZT16-19 0.34721748350000003 0.2732111265 0.4212238405 ZT20-23 0.83849315725 0.6546053624999999 1.022380952