condition mean min max ZT0-3 24.59388 24.59388 24.59388 ZT4-7 19.5588785 19.5588785 19.5588785 ZT8-11 24.5170765 24.5170765 24.5170765 ZT12-15 27.543391 27.543391 27.543391 ZT16-19 77.176795 77.176795 77.176795 ZT20-23 100.3065455 100.3065455 100.3065455