condition mean min max ZT0-3 160.88388 160.88388 160.88388 ZT4-7 225.06225899999998 225.06225899999998 225.06225899999998 ZT8-11 197.72642100000002 197.72642100000002 197.72642100000002 ZT12-15 198.125628 198.125628 198.125628 ZT16-19 196.4263565 196.4263565 196.4263565 ZT20-23 212.3748705 212.3748705 212.3748705