condition mean min max ZT0-3 43.87065 43.87065 43.87065 ZT4-7 35.25145 35.25145 35.25145 ZT8-11 52.486450000000005 52.486450000000005 52.486450000000005 ZT12-15 52.431 52.431 52.431 ZT16-19 48.730199999999996 48.730199999999996 48.730199999999996 ZT20-23 36.61855 36.61855 36.61855