condition mean min max ZT0-3 0.30621699999999996 0.3026395 0.3097945 ZT4-7 7.422525 7.422525 7.422525 ZT8-11 6.83145 6.83145 6.83145 ZT12-15 0 0 0 ZT16-19 1.5224900000000001 1.5224900000000001 1.5224900000000001 ZT20-23 1.2230055000000002 1.2230055000000002 1.2230055000000002