condition mean min max ZT0-3 16.103299999999997 16.103299999999997 16.103299999999997 ZT4-7 10.694379999999999 10.694379999999999 10.694379999999999 ZT8-11 14.1995 14.1995 14.1995 ZT12-15 16.628049999999998 16.628049999999998 16.628049999999998 ZT16-19 21.2472 21.2472 21.2472 ZT20-23 16.63935 16.63935 16.63935