condition mean min max ZT0-3 15.70345 15.70345 15.70345 ZT4-7 11.093665 11.093665 11.093665 ZT8-11 4.9996 4.9996 4.9996 ZT12-15 16.341250000000002 16.341250000000002 16.341250000000002 ZT16-19 10.32035 10.32035 10.32035 ZT20-23 18.856450000000002 18.856450000000002 18.856450000000002