condition mean min max ZT0-3 3.3927549999999997 3.166555 3.6189549999999997 ZT4-7 5.31032 5.31032 5.31032 ZT8-11 13.184349999999998 13.184349999999998 13.184349999999998 ZT12-15 0 0 0 ZT16-19 9.558205000000001 9.558205000000001 9.558205000000001 ZT20-23 7.125835 7.125835 7.125835