condition mean min max ZT0-3 44.747808 44.747808 44.747808 ZT4-7 50.325486 50.325486 50.325486 ZT8-11 50.1449255 50.1449255 50.1449255 ZT12-15 39.333248 39.333248 39.333248 ZT16-19 47.4216835 47.4216835 47.4216835 ZT20-23 44.4104765 44.4104765 44.4104765