condition mean min max ZT0-3 43.86539666666667 8.29519 65.3972 ZT4-7 8.959485 8.959485 8.959485 ZT8-11 13.3787 13.3787 13.3787 ZT12-15 36.779675 23.939349999999997 49.620000000000005 ZT16-19 60.167 60.167 60.167 ZT20-23 80.57785000000001 80.57785000000001 80.57785000000001