condition mean min max ZT0-3 135.051843 135.051843 135.051843 ZT4-7 110.20933400000001 110.20933400000001 110.20933400000001 ZT8-11 119.806179 119.806179 119.806179 ZT12-15 123.5056565 123.5056565 123.5056565 ZT16-19 176.369377 176.369377 176.369377 ZT20-23 198.68273549999998 198.68273549999998 198.68273549999998