condition mean min max ZT0-3 5.235659999999999 5.235659999999999 5.235659999999999 ZT4-7 3.03926 3.03926 3.03926 ZT8-11 10.74755 10.74755 10.74755 ZT12-15 18.57915 18.57915 18.57915 ZT16-19 16.57065 16.57065 16.57065 ZT20-23 5.422255 5.422255 5.422255